CN109844195B

CN109844195B - Device for cooling a heated filament

Info

Publication number: CN109844195B
Application number: CN201780061398.1A
Authority: CN
Inventors: S·康拉德; P·容贝克; T·穆恩斯特曼; T·拉马克斯
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2016-10-08
Filing date: 2017-02-14
Publication date: 2022-03-29
Anticipated expiration: 2037-02-14
Also published as: TWI765879B; EP3523469A1; TW201814094A; JP2019529734A; EP3523469B1; CN109844195A; JP6861807B2; WO2018065123A1

Abstract

The invention relates to a device for cooling a hot wire, wherein the wire can be guided in a groove bottom of an elongated cooling groove of a cooling element. The cooling bath is connected to a metering device for feeding a cooling liquid through a metering opening in the bath floor. In order to prevent the environmental burden caused by the steam and residual coolant occurring in this case, according to the invention the cooling element is enclosed in a housing which has a feed groove for the introduction of the thread, said feed groove extending between a thread inlet and a thread outlet on the housing.

Description

Device for cooling a heated filament

Technical Field

The invention relates to a device for cooling a heated filament.

Background

In order to finish the spun synthetic threads, it is known to apply a crimp to the threads during the texturing process. The threads are oriented and crimped in what is known as a deformation zone. To be crimped, a false twist is imparted to the filaments, which is spread opposite to the direction of the filaments. The wire in the twisted state is heated to a temperature in the range of 200 ℃. The plastic state of the thread material obtained here results in the presence of twists in the individual filaments of the thread. To set the filament structure, the filament is then directly cooled to a temperature of about 80 ℃. Thus, the crimp in the wire is retained and has the desired finishing effect. The cooling of the threads is preferably carried out here by means of an air-cooled cooling collar plate, on the surface of which the threads are guided in a contacting manner. However, a fundamental disadvantage of such cooling collars is that relatively long sections are required in order to obtain sufficient cooling with relatively high-speed movement of the wire. The prior art therefore discloses devices for cooling hot wires in which the wire cooling is carried out by means of a cooling liquid in order to be able to ideally realize a short cooling section.

Such a generic device for cooling a hot wire is disclosed for example by EP0403098a 2. In the case of the known device, a cooling element is provided which has a cooling channel and a plurality of recessed pockets in the channel floor of the cooling channel. The cooling tank is communicated to a coolant reservoir through a capillary tube so that the coolant is continuously introduced into the cooling tank. The heated wires are guided in contact through a cooling bath and cooled by a cooling liquid. The wire is then guided past a downstream cooling collar. The residual cooling liquid leaving at the outlet side of the cooling bath is collected and returned to the tank.

In the case of the known device, the cooling element is held directly in the machine environment, so that the steam present enters the environment unimpeded. Furthermore, the excess cooling liquid residues adhering to the thread are entrained by the latter and sometimes lead to undesirable environmental pollution and contamination of adjacent equipment.

Disclosure of Invention

The object of the present invention is now to provide such a versatile device for cooling hot wires, whereby any environmental burden caused by steam and residual cooling liquid is avoided.

Another object of the invention is to design such a universal device for cooling a heated wire conveniently for the operator.

According to the invention, this object is achieved in that the cooling element is enclosed in a housing and the housing has a passage slot for the introduction of the thread, said passage slot extending between a thread inlet and a thread outlet on the housing.

A feature of the invention is that the environment of the cooling element is delimited by the housing. In view of the passage slots in the housing, it is always ensured that the thread can be guided into the cooling slot of the cooling element without any significant auxiliary means. The passage groove in the housing extends between a thread inlet and a thread outlet in the housing. In this regard, the opening in the housing required for guiding the wire may be limited to a minimum size.

In order to prevent potential escape of steam from the lead-through groove, a development of the device according to the invention in which the lead-through groove is arranged on the housing side wall above the cooling groove of the cooling element is advantageous. It is therefore well known that steam rises out of the cooling bath. In view of the lateral arrangement of the feed-through groove, a direct connection between the cooling groove and the feed-through groove is not provided.

In order to achieve a defined guidance of the threads on the one hand and a strong wetting in the groove bottom of the cooling groove on the other hand, the cooling groove is preferably realized in the form of a groove bottom having a curvature. For this purpose, the threading slot between the thread inlet and the thread outlet is designed with a curvature which is at least partially equal to the curvature of the slot bottom. Thus, a substantially constant spacing between the cooling slot and the lead-through slot may be obtained, which spacing hinders the escape of steam across the entire cooling section.

The guiding of the thread in the treatment zone is improved in particular by the development of the invention in that the thread inlet is assigned an inlet thread guide element and the thread outlet is assigned an outlet thread guide element in the housing, and the cooling element extends between the thread guide elements. In particular, the angle at which the threads are moved into the cooling bath and are guided away from the cooling bath can then be set in a very precise and reproducible manner. No separate alignment of the cooling element within the textile machine is required.

In order to achieve an atmosphere which is as homogeneous as possible in the housing, it is also provided that a suction opening which is connectable to a suction device in the region of the thread outlet is arranged in the housing. The steam present in the housing during operation can then be continuously removed.

In this case, the suction opening is preferably arranged in the bottom of the housing between the cooling element and the thread outlet, so that residual cooling liquid entrained by the thread and released can be simultaneously discharged from the cooling channel.

In order to be able to generate an air exchange in the housing which is as uniform as possible, provision is also made for an air opening to the environment to be arranged in the housing in the region of the thread inlet opening. Continuous fresh air can then be fed in. The thread inlet and the thread outlet as well as the feed-through groove preferably have a minimum opening cross section. Entrapment of hot air by the filaments at the filament inlet may then be minimized.

The metering device is preferably arranged outside the housing and is connected to the cooling element in the housing by means of a fluid line. A predetermined amount of the cooling liquid can then be continuously supplied to the cooling tank.

For intensive cooling of the wire, the development of the invention in which the cooling bath has a plurality of recessed pockets in a portion of the bath floor, which pockets are each separated from one another by a guide web in the bath floor, is particularly advantageous, wherein the metering opening is arranged in an upstream portion of the bath floor.

Drawings

The device for cooling a hot wire according to the invention will be explained in more detail below by way of example and with reference to the accompanying drawings, in which:

figure 1 schematically shows a side view of an embodiment of the device according to the invention,

figure 2 schematically shows a front view of the embodiment of figure 1,

figure 3 shows schematically a longitudinal section through the embodiment of figure 1,

fig. 4 schematically shows a cross-sectional view of the embodiment of fig. 1.

Detailed Description

A first embodiment of a device for cooling a heated wire according to the invention is shown in many of the views in fig. 1 to 4. Fig. 1 shows a side view, fig. 2 shows a front view, fig. 3 shows a longitudinal section and fig. 4 shows a cross section of the device according to the invention. The following description applies to all figures, as long as none of them is explicitly mentioned.

An embodiment of the device according to the invention has an elongated housing 7. The elongated cooling element 1 is arranged in a housing 7. The cooling channel 2 extends on the upper side of the cooling element 1. The cooling channels 2 are directed to several end faces of the cooling element 1. The cooling channel 2 has a curved channel bottom 3. The metering opening 4 opens into the tank floor 3 in the inlet region of the cooling tank 2. The metering opening 4 communicates with a metering conduit 4.1, which penetrates all the way to the underside of the cooling element 1. A plurality of pockets 3.1 separated by a plurality of webs 3.2 in the slot floor 3 are arranged in the slot floor in a downstream portion of the metering opening 4.

The cooling element 1 is held by its underside on a housing base 7.3 of the housing 7.

As can be taken in particular from the illustration in fig. 4, the environment of the cooling element 1 is enclosed by a housing 7. The housing 7 also has, apart from the housing bottom 7.3, an opposite housing top 7.4 and two opposite housing side walls 7.1, 7.2. The housing wall 7.1 is realized in multiple parts and forms a through-opening 11.

As can be taken in particular from the illustration in fig. 1, the feed-through groove 11 extends over the entire length of the housing 7. In this embodiment, the lead-through groove 11 is realized in the form of a curvature having a curvature equivalent to that of the groove bottom surface of the cooling groove 2. The feed-through groove 11 can then be designed directly laterally alongside the cooling element 1 on the housing 7. The passage groove 11 is connected to the thread inlet 8 and the thread outlet 9 on the end side of the housing 7, as can be seen from the illustration in fig. 2, for example to the thread inlet 8.

The thread inlet 8 and the thread outlet 9 are arranged on the housing end walls 7.5, 7.6 of the housing 7. For this purpose, the inlet thread guide 8.1 is arranged on the housing end wall 7.5 and the outlet thread guide 9.1 is arranged on the housing end wall 7.2. The inlet guide element 8.1 and the outlet guide element 9.1 are preferably formed by a ceramic material and have guide grooves. In this embodiment, the inlet guide element 8.1 directly forms the thread inlet 8 and the outlet guide element 9.1 directly forms the thread outlet 9. In principle, the thread guiding elements 8.1,9.1 can be arranged in the housing 7 independently of the thread inlet 8 and the thread outlet 9.

As can be seen in particular from the illustration in fig. 3, the inlet guide wire means 8.1 and the outlet guide wire means 9.1 are arranged at a short distance from the end face of the cooling element 1. For guiding the thread, the guide grooves of the thread guiding elements 8.1,9.1 interact with the groove bottom 3 of the cooling groove 2.

As can also be taken from the view of fig. 3, a suction opening 10 is arranged in the housing bottom 7.3 in the region of the thread outlet 9 in the housing 7. The suction opening 10 is arranged between the end face of the cooling element 1 and the outlet thread guide 9.1. The suction aperture 10 is connected to a suction device (not shown in more detail here) by means of a suction line 13.

The housing side wall 7.2 on the opposite side has an air opening 12 in the intake region. The air port 12 is arranged in the region between the inlet guide wire 8.1 and the end face of the cooling element 1. The air port 12 opens into the environment of the housing 7.

The coolant supply is ensured by a metering device 6 arranged outside the housing 7. For this purpose, the metering device 6 has a metering means 6.1, such as a metering pump, and a container 6.2 filled with cooling liquid. The metering member 6.1 is connected to the metering conduit 4.1 of the cooling element 1 by means of a fluid line 5. For this purpose, a fluid coupling, by means of which the fluid line 5 is connected to the metering line 4.1, can be arranged, for example, in the housing bottom 7.3.

In operation, the metering device 6 continuously delivers a predetermined amount of cooling liquid to the cooling element 1, wherein the metered amount of cooling liquid is fed in through the metering opening 4 in the bottom side 3 of the cooling bath 2. In order to cool the heated wire, the wire is first introduced into the housing 7 via the through-opening groove 11 at the beginning of the treatment process and then placed into the inlet wire guide 8.1, the cooling groove 2 and the outlet wire guide 9.1. The wire moves in contact through the cooling bath 2 on the bath floor 3. The wire is wetted and cooled here by the cooling liquid. The steam which occurs here accumulates in the housing 7 and is removed via the suction opening 10. Here, the continuous fresh air flow is directed via the air opening 12 into the interior of the housing 7. An air flow is established which is uniform in the wire running direction and which contributes to the steam discharge above the cooling bath 2. Furthermore, the air flow on the outlet side of the threads is used to suck off the poorly adhering cooling liquid from the threads at the freely guided thread section between the cooling element 1 and the outlet thread guide 9.1. Thus avoiding residual coolant from escaping the housing 7. Any thermally induced outgassing can likewise be avoided by the side of the lead-through groove 11 being provided on the housing 7. The environment of the housing 7 is then kept substantially free of steam and residual cooling liquid.

The device for cooling a thread according to the invention is therefore particularly suitable for use in texturing machines having a plurality of processing positions. A plurality of such devices may then be employed in a deforming machine. Although the wire is cooled strongly by the cooling liquid, no environmental load arises in the texturing machine. A quick and simple operating procedure for threading the wire can be carried out by the operator by means of the threading slot on the housing.

In the case of the exemplary embodiment shown in fig. 1 to 4, the advantageous configuration of the cooling element 1 is exemplary. Thus, the cooling element may be configured with or without a pocket in the bottom surface of the groove. Furthermore, a plurality of cooling elements arranged one behind the other and collectively enclosed in the housing can also be provided. It is essential here that the environment of the cooling element is sealed off by the housing and that the housing has a feed-through groove which can be used for feeding through a thread.

Claims

1. A device for cooling hot wires by means of a cooling element (1) having an elongated cooling groove (2) for guiding the wires, wherein the cooling groove (2) is connected to a metering device (6) for feeding a cooling liquid via a metering opening (4) in a groove bottom (3), characterized in that the cooling element (1) is enclosed in a housing (7), and the housing (7) has a feed-through groove (11) for introducing the wires, the feed-through groove (11) extending between a wire inlet (8) and a wire outlet (9) on the housing (7), in the housing (7) an inlet wire guide (8.1) being assigned to the wire inlet (8), an outlet wire guide (9.1) being assigned to the wire outlet (9), the inlet wire guide (8.1) and the outlet wire guide (9.1) each being provided with a V-shaped groove with a rounded bottom, and the cooling element (1) extends between the guide wire elements (8.1, 9.1).

2. Device according to claim 1, characterized in that the lead-through slot (11) is arranged on the housing side wall (7.1) above the cooling slot (2) of the cooling element (1).

3. Device according to claim 2, characterized in that the cooling bath (2) has a curved bath bottom (3) and the threading bath (11) between the thread inlet (8) and the thread outlet (9) has a curvature at least partially equivalent to the curvature of the bath bottom (3).

4. A device according to any one of claims 1 to 3, characterized in that a suction opening (10) which can be connected to a suction device (13) is arranged in the housing (7) in the region of the thread outlet (9) on the housing (7).

5. Device according to claim 4, characterized in that the suction opening (10) is arranged in the housing bottom (7.3) between the cooling element (1) and the thread outlet (9).

6. Device according to claim 5, characterized in that an air opening (12) to the environment is arranged in the housing (7) in the region of the thread inlet (8).

7. A device according to any one of claims 1 to 3, characterized in that the metering device (6) is arranged outside the housing (7) and is connected to the cooling element (1) in the housing (7) by means of a fluid line (5).

8. An arrangement according to claim 7, characterised in that the cooling channel (2) has a number of recessed pockets (3.1) in a part of the channel bottom (3), which pockets are each separated from each other by a guide web (3.2) in the channel bottom (3), wherein the metering opening (4) is arranged in an upstream part of the channel bottom (3).