JP7033881B2 - Cooling device for synthetic yarn - Google Patents

Description

The present invention relates to a cooling device for synthetic yarns, particularly a cooling device for twisted yarns in a textured zone according to the superordinate concept of claim 1.

During the production of synthetic yarns, it is known that the multifilament yarn produced in the melt spinning process is curled in the post-spinning process. Thereby, the synthetic yarn obtains a structure similar to that of natural fiber. Further processing of the synthetic yarn is performed by a plurality of textured processing machines, and these textured processing machines have a large number of processing units for winding and contracting the yarn in each processing unit. The winding of the yarn (also called the so-called textured processing) can be achieved by the so-called false twisting process. At this time, the yarn is subjected to mechanical false twisting that is heat-treated in the so-called textured zone. Due to the heat treatment, the plying is heated to a temperature of about 200 ° C. and subsequently cooled again. Since the false twist on the yarn propagates in the direction opposite to the yarn running direction, the twist on the yarn is guaranteed to pass through the cooling device and enter the heating device as unimpeded as possible. There must be. For this purpose, a cooling device formed as a curved cooling rail is usually used. At this time, since the radius of curvature as large as possible is used for the cooling rail, the contact friction between the twisted yarn and the surface of the cooling rail can be kept small. Such cooling rails use only ambient air to cool the yarn. Therefore, such a cooling device requires a relatively long cooling section, and because of this relatively long cooling section, the texturer usually has a multi-layer structure.

In the prior art, there are also known cooling devices in which the cooling of the yarn is enhanced by the coolant. Such a type of cooling device is known, for example, from European Patent Application Publication No. 0403098 (EP 0 403 098 A2). In the case of such a cooling device, the plying in the textured zone is guided through a cooling groove provided on the surface of the cooling body, and the cooling groove is a coolant for wetting the yarn at the bottom of the groove. Holds. Wetting of the yarn favors the frictional properties of the yarn between the yarn and the contact rails, thus facilitating the transmission of twists. However, due to the twisted yarn structure, it is difficult for the coolant to penetrate into the yarn. False twisting creates inherent dynamics that make it difficult for the coolant, which is simply entrained by the yarn and scattered as it exits the cooling groove, to adhere inside the yarn. Especially in the case of a yarn having a relatively large count, the yarn is not sufficiently cooled inside the yarn, and in a known cooling device, the yarn is continuously guided through the cooling rail for further cooling.

Therefore, the object of the present invention is to improve such a type of cooling device to achieve the strongest possible cooling of the yarn by applying a cooling fluid.

Yet another object of the present invention is to wet the yarn so that the excess of residual coolant is as small as possible.

Such a problem, according to the present invention, is that the cooling body has at least one ceramic insert in the thread entry portion, and this ceramic insert has a cooling groove at the bottom of the groove having a corrugated groove. On the corrugated grooved surface of this ceramic insert, which is formed in, the threads can be guided in contact, this time achieved by the metering opening correspondingly arranged to the ceramic insert. To.

The favorable development form is defined by the features and combinations of features of each dependent claim.

The present invention has the special advantage that the coolant is distributed through the wet zone within the cooling groove without being directly entrained by the yarn. At this time, the yarn is guided while being in contact with the ceramic insert that forms the groove bottom portion with the corrugated groove in the cooling groove. In this way, the yarn can be guided through a plurality of support units that limit friction in the yarn and do not interfere with twisting despite strong contact. The groove at the bottom of the groove, which is filled with the coolant, prevents the significant evaporation of the liquid in the yarn, which occurs especially in the early stages, and constantly reapplies the liquid to the yarn.

At this time, it is preferable that the coolant is supplied in the run-in zone at the bottom of the groove, which is placed in front of the bottom of the groove having the corrugated groove. Therefore, the metering opening is open in the run-in zone through which the yarn passes through with or without contact, preferably without contact. Thereby, continuous metering supply of the coolant to the cooling groove is possible.

The guided yarn in the textured zone has a high inherent dynamics, especially at the yarn outlet of the cooling device located corresponding to the subsequent textured assembly, so for stable yarn guidance, the book. The developed form of the invention is preferably carried out. In this evolution, the cooling body comprises at least one other ceramic insert having a corrugated groove bottom at the thread exit of the cooling groove, where the cooling groove is between these ceramic inserts. Also provided with at least one guide portion having a smooth groove bottom. Therefore, the yarn can be guided in the cooling groove while the yarn is sufficiently in contact with the yarn outlet without causing unacceptably high yarn friction. Further, the residual liquid that may be generated in the yarn can be retained at the bottom of the groove. Therefore, it is possible to avoid dripping of the liquid after the yarn has left the cooling groove.

The smooth groove bottom of the guide is a groove with a corrugated groove so that the guide between the ceramic insert at the thread entry and the ceramic insert at the thread exit can be used for cooling. It has a larger groove depth than a ceramic insert with a bottom. Therefore, contact of the yarn is avoided and uniform cooling of the freely guided yarn is achieved.

The ceramic insert is a cooling groove in the range of 10 mm to 60 mm, depending on the yarn count, so that the yarn can be calibrated and wetted depending on the yarn count, especially in the yarn entry portion. Each has a length portion. For example, some such ceramic inserts may be formed in the cooling grooves at intervals from each other.

Based on the corrugated groove bottom structure of the ceramic insert, relatively large yarn diversions can be achieved within the textured zone. For example, the ceramic inserts are preferably disposed of each other in the cooling body so that the groove bottoms have a guide curvature having a radius in the range of 300 mm to 1000 mm in the yarn running direction. Thereby, it is possible to realize a very compact texture processing zone in the texture processing machine.

Since the structure of the cooling groove in the cooling body is advantageous to be implemented in a segmented shape, the individual cooling groove portions are alternately formed by the ceramic inserter or the material inserter, in which case the ceramic inserter and the material inserter are formed. , Both are held on one support. The ceramic insert forms a guide portion of the cooling groove for thread contact guidance, and the material insert forms a guide portion with a smooth groove bottom for thread non-contact guidance. ..

However, at this time, it is also possible to integrally form the material insert and the support.

In order to avoid the generation of steam and the contamination of the surroundings, according to the developed form of the present invention, the cooling body is arranged between the yarn inlet and the yarn outlet inside the housing, and the yarn outlet is located. A suction opening is formed in the housing in the region, and it is particularly preferred that the suction opening be connectable to a suction device.

A suction opening is formed between the cooler and the thread outlet at the bottom of the housing to allow as much residual liquid as possible to be discharged as well as steam. Therefore, it is possible to generate a suction flow guided in the thread portion that is freely guided between the cooling body and the thread outlet.

The thread guide in the textured zone is particularly developed by the present invention by having an inlet thread guide correspondingly arranged at the thread inlet of the housing and an outlet thread guide correspondingly arranged at the thread outlet of the housing. It can be improved depending on the form. Thereby, the introduction / exit angle at which the yarn enters the cooling groove and is derived can be adjusted particularly accurately and reproducibly. At this time, it is not necessary to individually adjust the cooling device in the textile machine.

Hereinafter, the cooling device according to the present invention for synthetic yarn will be described in detail based on a plurality of embodiments shown in the accompanying drawings.

It is a vertical sectional view schematically showing the 1st Embodiment of a cooling apparatus. 2.1 and 2.2 are cross-sectional views schematically showing the embodiment of FIG. 1. It is a vertical sectional view schematically showing another embodiment of the cooling apparatus according to this invention. It is a vertical sectional view schematically showing another embodiment of the cooling apparatus according to this invention.

1, FIG. 2.1 and FIG. 2.2 are views of the first embodiment of the cooling device according to the present invention as viewed from different directions. FIG. 1 schematically shows a vertical cross-sectional view of the cooling device according to the present invention, and FIGS. 2.1 and 2.2 show cross-sectional views of the cooling device according to the present invention, respectively. Therefore, if one of the drawings is not explicitly referred to, the following description is true for all drawings.

The first embodiment of the cooling device according to the present invention comprises a vertically long cooling body 1. An open cooling groove 2 extends on the surface of the cooling body 1. The cooling groove 2 extends between the thread entry portion 7 and the thread ejection portion 8, and the thread entry portion 7 and the thread ejection portion 8 are formed on the end face portion of the cooling body 1. .. In the thread running portion 7, the ceramic insert 3.1 is held by the cooling body 1 in the cooling groove 2. The ceramic insert 3.1 is incorporated into the cooling groove 2 to form a geriffelt groove bottom 4.1. A run-in zone 7.1 is placed in front of the groove bottom portion 4.1 having a corrugated groove, and this run-in zone 7.1 forms a thread run-in portion 7. A metering opening 5 is opened in the entry zone 7.1 of the ceramic insert 3.1. The metering opening 5 is connected to the metering device 6 via a metering passage 5.1 penetrating the ceramic insert 3.1 and the cooling body 1.

The metering device 6 has a fluid pipeline 6.1, a metering means 6.2, and a container 6.3. A coolant is contained in the container 6.3, and the coolant is supplied to the metering passage 5.1 via the metering means 6.2 (for example, a metering pump) and the fluid pipeline 6.1. Will be done.

The ceramic insert 3.1 extends in the cooling groove 2 over the length portion designated by the reference numeral L in FIG. Depending on the yarn count, the ceramic insert 3.1 has a length portion in the range of 10 mm to 60 mm.

As can be seen from the drawing of FIG. 1, the ceramic insert 3.2 is similarly arranged in the thread running portion 8. The ceramic insert 3.2 is incorporated in the cooling groove 2 and forms a groove bottom portion 4.1 having a corrugated groove. The groove bottom portion 4.1 with the corrugated groove of the ceramic inserts 3.1 and 3.2 is formed to be substantially the same. To further illustrate the ceramic inserts 3.1 and 3.2, FIG. 2.1 shows a cross-sectional view of the ceramic insert 3.1 in the region of the groove bottom with corrugated grooves. ..

As can be seen from FIG. 2.1, the ceramic insert 3.1 is embedded in the cooling body 1 in order to form the cooling groove 2. At this time, the groove bottom portion 4.1 having the corrugated groove is formed by the plurality of recessed grooves 9 and the plurality of convex webs 10. The web 10 preferably has a width of several mm. At this time, the groove 9 and the web 10 may have the same width or different widths.

The web 10 forms a groove bottom 4.1 and has _a groove depth indicated by reference numeral t1 in FIG. 2.1. On the other hand, the groove 9 is formed to have a groove depth larger than that _, and the groove depth is shown by the reference numeral t3 in FIG. 2.1.

As can be seen from FIG. 1, the cooling groove 2 in the central region between the ceramic inserts 3.1 and 3.2 includes a guide portion having a smooth groove bottom 4.2. At this time, the groove depth of the smooth groove bottom portion 4.2 is formed to be larger than the groove depth of the groove bottom portion 4.1 having the corrugated groove in the ceramic inserts 3.1 and 3.2. The groove depth of the smooth groove bottom _4.2 is indicated by reference numeral t2 in FIGS. 1 and 2.2. By doing so, the yarn is guided while being in contact with the groove bottom portion 4.1 of the cooling groove 2 having the corrugated groove only at the thread entry portion 7 and the thread exit portion 8. In the central region, the yarn is guided without contacting the upper side of the smooth groove bottom 4.2 of the cooling groove 2.

At the time of operation, the cooling liquid is supplied to the cooling groove 2 via the metering device 6. The coolant flows through the metering opening 5 in the run-in zone 7.1 of the ceramic insert 3.1. At this time, the run-in zone 7.1 may have the same or larger groove depth as compared with the groove bottom portion 4.1 having the corrugated groove. Preferably, the groove depth of the run-in zone 7.1 is selected to be slightly greater than the groove depth of the corrugated groove bottom 4.1. Therefore, the first contact of the thread when running into the cooling groove 2 is performed at the groove bottom portion 4.1 provided with the corrugated groove. A portion of the inflowing coolant is absorbed by the traveling thread and a portion is distributed via the groove bottom 4.1 provided with a corrugated groove. Therefore, the length portion L of the ceramic insert 3.1 forms a wet zone in which the coolant is supplied to the running yarn.

In order to obtain strong contact between the thread and the groove bottom 4.1 with the corrugated groove, the ceramic inserts 3.1 and 3.2 form a guide curve with a radius R in the thread travel direction. ing. For this, the radius R is schematically shown in FIG. The guide radius of curvature R for guiding the yarn is usually in the range of 300 mm to 1000 mm.

By doing so, the yarn is guided in contact only within the range of the ceramic inserts 3.1 and 3.2. In the central region, the yarn is guided through the cooling groove 2 without contact, allowing free evaporation in all directions around the yarn, thus achieving intensive cooling.

The cooling body 1 is preferably arranged in the housing in order to prevent the periphery of the cooling device from becoming dirty. With respect to this, another embodiment of the cooling device is shown schematically as a vertical cross-sectional view.

The embodiment shown in FIG. 3 has a cooling body 1 composed of a plurality of members. In the present embodiment, the cooling body 1 is formed by one support 12, a plurality of ceramic inserts 3.1, and a plurality of material inserts 11.1, 11.2, 11.3. The ceramic inserts 3.1 to 3.4 and the material inserts 11.1 to 11.3 are alternately held on the support 12 and form an open cooling groove 2 on their upper surface. .. By doing so, the inserts 3.1 to 3.4 and 11.1 to 11.3 each form a part of the cooling groove 2.

The ceramic insert 3.1 is formed identically to the above embodiment having a run-in zone 7.1 and a corrugated groove at the groove bottom 4.1. The other ceramic inserts 3.2, 3.3, 3.4 all have a groove bottom 4.1 with corrugated grooves.

On the other hand, the material inserts 11.1, 11.2, and 11.3 form a smooth groove bottom portion 4.2 in the cooling groove 2. At this time, since the smooth groove bottom portion 4.2 is formed to have a larger groove depth in the cooling groove 2, the yarn is guided while being in contact with the groove bottom portion 4.1 provided with the corrugated groove. There is.

In the ceramic insert 3.1, a metering opening 5 connected to the metering device 6 via the metering passage 5.1 is correspondingly arranged.

The cooling body 1 extends between the thread inlet 14 and the thread outlet 15 inside the housing 13. The thread inlet 14 and the thread outlet 15 are each formed on the end face portion of the housing 13. In the present embodiment, the thread inlet 14 is formed by the incorporated inlet thread guide 14.1 and the thread outlet 15 is formed by the incorporated outlet thread guide 15.1. The inlet thread guide 14.1 and the outlet thread guide 15.1 are preferably made of ceramic and have a guide groove. Basically, the thread guides 141 and 15.1 may be arranged inside the housing 13 or outside the housing 13 independently 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 thread entry portion 7 and the thread ejection portion 8 of the cooling groove 2. At this time, the guide grooves of the thread guides 141 and 15.1 cooperate with the ceramic inserts 3.1 and 3.4 in the cooling groove 2 for thread guidance.

In the region of the thread outlet 15, a suction opening 17 is formed inside the housing 13 at the bottom portion 16 of the housing. 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.

In the entry area on the opposite side, the housing 13 has an air opening 19. 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 around the housing 13.

The supply of coolant is ensured by a metering device 6 located outside the housing 13. Therefore, the metering device 6 has a metering means 6.2 such as a metering pump and a container 6.3 filled with a coolant. The metering means 6.2 is connected to the metering passage 5.1 of the cooling body via the fluid pipeline 6.1.

During operation, the metering device 6 continuously pumps a predetermined amount of coolant to the cooling body 1, and the metered coolant is cooled through the metering opening 5 of the run-in zone 7.1. It is supplied to 2. In order to cool the heated yarn, the synthetic yarn (particularly the yarn twisted in the textured processing process) is guided through the cooling groove 2. The yarn passes through the cooling groove 2 while making contact on the surface of the ceramic insert 3.1, 3.2, 3.3, 3.4. At this time, the yarn is wetted in the ceramic insert 3.1 in which the liquid is distributed to the corrugated groove structure of the groove bottom 4.1.

The steam generated during the cooling of the yarn 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. As described above, 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, this air flow is used to suck the residual coolant still loosely adhering to the yarn in the yarn portion that is freely guided between the cooling body 1 and the outlet yarn guide 15.1 To. By doing so, leakage of the residual liquid from the housing 13 is avoided.

In the embodiment shown in FIG. 3, the cooling body has a structure composed of a plurality of members having various insert bodies. It is also possible that the structure of the cooling body 1 is such that the cooling groove portions having a smooth groove bottom formed by the insert body are connected to each other.

FIG. 4 shows another feasible embodiment of the cooling device according to the present invention. Since the embodiment shown in FIG. 4 is substantially the same as the embodiment shown in FIG. 3, only the differences will be described here.

In the embodiment shown in FIG. 4, the cooling body 1 is formed of a support 12 and a plurality of ceramic inserts 3.1, 3.2, 3.3, 3.4. Therefore, the support 12 has a plurality of guide portions of the cooling groove 2 arranged between the ceramic inserts 3.1 to 3.4. By doing so, the smooth groove bottom 4.2 of the cooling groove 2 is integrated with the support 12. The support 12 may be formed, for example, as a cast made of plastic or a cast made of metal, in which the ceramic inserts 3.1 to 3.4 are held.

In the embodiment shown in FIG. 4, the housing 13 has a thread inlet 14 and a thread outlet 15 at its end faces, respectively. At this time, the yarn is directly guided to the cooling body 1 through the yarn inlet 14 without a yarn guide. Similarly, on the outlet side, the outlet yarn guide is not arranged correspondingly to the yarn outlet 15. At this time, the yarn is directly guided to the yarn entry portion 7 via the ceramic insert 3.1, and is guided to the yarn exit 8 by the ceramic insert 3.4.

Since the function of cooling the yarn is the same as that of the embodiment shown in FIG. 3, further description thereof will be omitted here.

The cooling device according to the present invention is particularly suitable for use in a textured processing machine having a large number of processing units.

Claims (11)

A cooling device for synthetic yarn
A vertically long cooling body (1) is provided, and the cooling body (1) has an open cooling groove (2) for guiding the thread, and at this time, the cooling groove (2). In the cooling device, which is connected to the metering device (6) for supplying the coolant through the metering opening (5) at the bottom of the groove (4.1, 4.2).
The cooling body (1) has at least one ceramic insert (3.1) in the thread entry portion (7), and the ceramic insert (3.1) is provided with a corrugated groove. The groove bottom portion (4.1) is formed in the cooling groove (2), and on the surface of the ceramic insert (3.1), the thread can be guided while being in contact with the thread, and at this time, the metering opening (the metering opening (1)). 5) is a cooling device for synthetic yarns, characterized in that it is arranged corresponding to the ceramic insert (3.1). The metering opening (5) is placed in front of the groove bottom portion (4.1) provided with the corrugated groove in the ceramic insert, and the groove bottom portion (4.1) of the cooling groove (2) is provided. ), The cooling device according to claim 1, which is open to the entry zone (7.1). The cooling body (1) is at least one other ceramic insert (3.) having a groove bottom portion (4.1) having the corrugated groove in the thread running portion (8) of the cooling groove (2). 2), wherein the cooling groove (2) has at least one guide having a smooth groove bottom (4.2) between both ceramic inserts (3.1, 3.2). The cooling device according to claim 1 or 2, which has a portion. The guide portion having the smooth groove bottom portion (4.2) has a larger groove depth than the ceramic insert (3.1, 3.2) having the groove bottom portion (4.1) having the corrugated groove. 3. The cooling device according to claim 3. Any one of claims 1 to 4, wherein the ceramic inserts (3.1, 3.2) each form a length portion of the cooling groove (2) in the range of 10 mm to 60 mm. The cooling device according to the item. The ceramic insert (3.1, 3.2) has a guide curvature such that the groove bottom (4.1) has a radius (R) in the range of 300 mm to 1000 mm along the thread running direction. The cooling device according to any one of claims 1 to 5, which is arranged with each other in the cooling body (1). The cooling body (1) has the plurality of ceramic inserts (3.1, 3.2) and the plurality of material inserts (11.1 to 11.3) in order to form the cooling groove (2). The ceramic insert (3.1, 3.2) and the material insert (11.1 to 11.3) each form at least one groove bottom of the cooling groove (2). And alternately held by one support (12), where the material inserts (11.1 to 11.3) are the guide portion having the smooth groove bottom (4.2). The cooling device according to any one of claims 1 to 6, wherein each of the cooling devices is formed. The cooling device according to claim 7, wherein the material insert (11.1 to 11.3) and the support (12) are integrally formed. 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 cooling device according to any one of claims 1 to 8, wherein a suction opening (17) is formed, and the suction opening (17) can be connected to a suction device. The cooling device according to claim 9, 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 9 or 11.

Images