Device for cooling moving wires

Abstract

This invention relates to an apparatus for cooling moving yarns, comprising an elongated cooling element. The cooling element has a cooling tank and cooperates with a metering device for supplying coolant. The metering device is connected to the cooling tank via a fluid communication mechanism on the cooling element. To allow a constant supply of coolant independent of yarn guidance, the fluid communication mechanism according to the invention is arranged on the tank wall of the cooling element above the tank bottom and transverse to the cooling tank.

Description

Technical Field

[0001] This invention relates to a device for cooling moving filaments. Background Technology

[0002] WO2018 / 065023A1 discloses this type of device for cooling moving wires.

[0003] In textile processes used to process synthetic yarns, it is generally customary to heat the synthetic yarns to processing temperatures above their glass transition temperature in order to produce special effects within the multifiber yarns. For example, yarns with a very smooth texture produced in melt spinning processes are crimped in this way during further processing. This type of crimping is achieved by twisting the multifiber yarns and by means of heat treatment involving heating and cooling. To cool the yarns, they are typically guided across a cooling metal surface in the form of elongated cooling rails. This can be enhanced by additionally wetting the yarns with a coolant. WO2018 / 065023A1 discloses this type of apparatus for cooling moving yarns.

[0004] In known devices, a wire is guided through an elongated cooling tank. A fluid communication mechanism is positioned at the inlet of the cooling tank, extending directly into the bottom of the tank through a metering orifice. This allows for an advantageous, continuous supply of fluid directly to the wire guided within the cooling tank. The amount of fluid metered and distributed to the wire is substantially related to the cross-sectional area of ​​the metering orifice at the bottom of the cooling tank. The wire velocity should also be considered, especially for small flow rates, to prevent the metering orifice from being emptied by capillary action. Summary of the Invention

[0005] Therefore, the object of the present invention is to improve this type of device for cooling moving threads so as to uniformly wet the threads with a constant metered amount of coolant.

[0006] According to the present invention, this objective is achieved by arranging the fluid communication mechanism on the wall of the cooling component in a manner that is located above the bottom of the tank and transverse to the cooling tank.

[0007] The difference in this invention is that the coolant supply enters the bottom of the cooling tank unaffected by the filaments. The influence of filament speed or thickness on coolant metering is avoided. Furthermore, coolant metering can be performed independently of the outlet cross-section of the long fiber end. In this way, a relatively large outlet cross-section can be selected for the fluid communication mechanism.

[0008] Since the wire reaches its highest temperature upon entering the cooling tank, it is preferable to implement the following improvement: the fluid communication mechanism is designed with an outlet pipe in the wire inlet region, which passes through the tank wall of the cooling element and extends into the cooling tank. In this way, coolant can be directly supplied to the entering wire. On the one hand, this method allows for a strong cooling effect through coolant evaporation. Furthermore, this method advantageously avoids residual liquid. According to this embodiment, the outlet pipe can protrude into the cooling tank through its outlet end.

[0009] To ensure the yarn is wetted upon contact with the cooling tank, the following improvement of the present invention is particularly advantageous, wherein the outlet end of the outlet pipe terminates flush with the inner contour of the tank wall above the cooling tank. In this way, the coolant can exit the outlet pipe and be guided to the bottom of the tank through the tank wall. There is also the possibility of influencing the coolant distribution through a special shape of the tank wall in the nozzle area of ​​the outlet pipe.

[0010] Since the cooling element heats up due to the heated wires, especially in the inlet region of the cooling element, the following improvement of the present invention is particularly advantageous: the outlet pipe is formed of plastic material and is held in the tank wall of the cooling element by a heat-insulating bracket. In this way, the supply of coolant and, in particular, the temperature of the coolant are maintained at a constant level and are independent of the heating effect caused by the moving wires.

[0011] To prevent leakage, it is also stipulated that a seal be installed in the tank wall between the outlet end of the outlet pipe and the insulating support on the circumference of the outlet pipe.

[0012] To attach the coolant line, a connector is attached to the inlet end of the outlet pipe, which protrudes outside the coolant assembly, wherein the connector has a hose fitting.

[0013] What has proven particularly successful here is that the outlet pipe and connector are integrally formed by an L-shaped plug connector. The latter allows for easy assembly and disassembly and is beneficial for thermal insulation.

[0014] The plug-in connector here is preferably held on the housing of the cooling component by a clamping bracket. In this way, complex threaded connections used to secure the fluid communication mechanism can be avoided.

[0015] The housing is preferably formed from a profile with an opening on one side, so that an insertion slot for introducing the thread can be formed by the housing side plate together with the profile. As a result, a complicated threading process at the beginning of the process can be avoided.

[0016] To utilize the potential dynamic movement of the yarn during wetting, the following improvement of the present invention is particularly advantageous, wherein a ceramic insert is positioned downstream of the fluid communication mechanism in the direction of yarn movement, located at the bottom of the cooling tank, forming the tank bottom. The yarn can be ideally guided in this manner without friction so that dynamic forces, such as twisting within the yarn, can be used for wetting. Furthermore, the grooves of the ceramic insert can be filled with coolant, thereby hindering coolant evaporation through continuous wetting.

[0017] The apparatus for cooling moving threads according to the invention allows for powerful cooling of moving threads under constant conditions. Attached Figure Description

[0018] The apparatus for cooling a moving thread according to the present invention will be explained in more detail below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 A side view schematically illustrating an embodiment of the device for cooling heated wires according to the present invention is shown.

[0020] Figure 2 schematically shown Figure 1 Longitudinal cross-sectional view of the embodiment,

[0021] Figure 3 schematically shown Figure 1 A cross-sectional view of an embodiment. Detailed Implementation

[0022] exist Figure 1 , Figure 2 and Figure 3 The first embodiment is illustrated schematically with multiple views. Figure 1 Showing a side view, Figure 2 A longitudinal section view is shown. Figure 3 Cross-sectional views are shown. Unless one figure is explicitly mentioned, the following description applies to all figures.

[0023] Figure 1 and Figure 2 The embodiment shown in the figure has an elongated housing 15 extending between a wire inlet 8 and a wire outlet 9. In the side view, the wire inlet 8 is on the right and the wire outlet 9 is on the left. Conversely, in the longitudinal section view, the wire inlet 8 is on the left and the wire outlet 9 is on the right, as shown in the figure.

[0024] therefore, Figure 1 A fluid communication mechanism 6 is shown in the wire inlet 8 region on the housing 15. The fluid communication mechanism 6 is disposed on the longitudinal side of the housing 15. The fluid communication mechanism 6 is connected to the metering device 5. The metering device 5 includes at least a metering pump 5.1 and a tank 5.2 containing coolant. The structure of the fluid communication mechanism 6 will be explained in more detail below.

[0025] In the area of ​​the thread outlet 9, a suction connector 21 is provided on the lower side of the housing 15. Now refer to Figure 2 In order to further explain this embodiment.

[0026] exist Figure 2 In the longitudinal cross-sectional view shown, the cooling element 1 is disposed within the housing 15. The elongated cooling element 1 has an open cooling groove 2 on its upper side, extending to the front end of the cooling element 1. The cooling groove 2 has a curved bottom 4. In the inlet region of the cooling groove 2, a fluid communication mechanism is introduced into the groove wall 3 of the cooling groove 2 through an outlet end 7.1. As mentioned above, the fluid communication mechanism 6 will be explained in more detail below (in... Figure 2 (Not shown in more detail). In this way, the fluid communication mechanism 6 opens on the tank wall 3 of the cooling element 1 above the tank bottom 4 and transverse to the cooling groove 2.

[0027] The ceramic insert 18 in the bottom of the tank 4 is arranged downstream of the outlet end 7.1 of the fluid communication member 6 in the direction of wire movement. The ceramic insert 18 is recessed in the bottom of the tank and forms the bottom surface 4.1 in the extension of the bottom of the tank 4.

[0028] Another ceramic insert 18 is recessed in the bottom 4 of the cooling groove 2 at the opposite end of the cooling member 1. Here, the ceramic insert 18 also forms a grooved bottom surface 4.1 in the bottom 4.

[0029] Within the housing 15, the cooling element 1 is provided with an inlet wire guide 19 and an outlet wire guide 20, which are positioned opposite each other. The inlet wire guide 19 is assigned to the wire inlet 8 of the housing 15. Therefore, the outlet wire guide 20 is assigned to the wire outlet 9 of the housing 15. The housing 15 also has a suction connector 21 on the outlet side.

[0030] To explain fluid inflow 6, refer now. Figure 3 . Figure 3 Show Figure 1 and Figure 2 A cross-sectional view of an embodiment is shown. This cross-section is shown in the region of the fluid communication mechanism 6. The cooling element 1 is encapsulated within a housing 15. In this case, the housing 15 is formed of a profile 15.1 with side openings. Side plates 16 are provided on the side of the opening profile of the housing 15. An insertion slot 17 is formed here between the profile 15.1 and the side plates 16. The insertion slot 17 extends along the entire length of the housing 15.

[0031] Cooling element 1 is held between side plate 16 and profile 15.1. Cooling element 1 is penetrated by cooling groove 2 extending between groove walls 3. One of the groove walls 3 has a stepped hole 3.1. Stepped hole 3.1 passes through groove wall 3 to cooling groove 2. Outlet pipe 7 is held within stepped hole 3.1. Outlet pipe 7 extends through outlet end 7.1 to cooling groove 2. Outlet end 7.1 of outlet pipe 7 ends flush with groove wall 3.

[0032] The outlet pipe 7 is held within the stepped hole 3.1 by the heat insulation bracket 10. The seal 11 is disposed on the circumferential surface of the outlet pipe 7 between the heat insulation bracket 10 and the outlet end 7.1 of the outlet pipe 7.

[0033] The outlet pipe 7 is connected to the connector 12 via the inlet end. The connector 12 and the outlet pipe 7 are integrally constructed as a plug connector 13. The plug connector 13, which has the connector 12 and the outlet pipe 7, is formed of plastic material. As a result, the fluid communication mechanism 6 is provided on the housing 15 so as to be insulated, especially relative to the cooling element 1. The supply of coolant can be carried out at a constant coolant temperature.

[0034] The plug connector 13 is held onto the housing 15 by a clamping bracket 14. This situation also applies to... Figure 1 The figure is schematically shown. Connector 12 here has a hose fitting 12.1 for connection to metering device 5 via fluid line 22.

[0035] At work, Figures 1 to 3 In the illustrated embodiment, a continuously moving wire is supplied through the insertion slot 17 at the start of the process. Then, the metering device 5 is activated to cool the wire so that coolant, particularly water, is supplied to the cooling tank 2 via the fluid communication mechanism 6. The coolant is supplied at the outlet end 7.1 of the cooling tank 2 through the outlet pipe 7. The coolant here flows automatically through the tank wall 3 to the bottom 4 of the cooling tank 2. The moving wire, guided by the inlet guide 19, slides along the bottom 4 and is wetted by the coolant in the inlet region. During its further journey, the wire encounters a ceramic insert 18 with a grooved bottom surface 4.1. This results in further homogenization of the wire wetting. The wire is discharged through the outlet guide 20 as it passes through the cooling tank 2.

[0036] Water vapor and potential residual fluid accumulated in the housing 15 are received and discharged through the suction connector 21 in the area of ​​the wire outlet 9.

[0037] The apparatus for cooling moving yarns according to the invention, as shown in the embodiment, is particularly suitable for cooling twisted yarns over short distances during deformation. A particular advantage is also provided that the opening cross-section of the outlet pipe 7 can be selected to be relatively large, thus preventing contamination. Furthermore, potential deposits on the bottom 4 of the cooling tank 2 can be removed without obstructing the fluid communication mechanism 6. Additionally, the thermal insulation of the fluid communication mechanism 6 relative to the cooling element 1 ensures uniform temperature control of the supplied coolant.

Claims

1. A device for cooling moving threads, which device has a cooling element (1) and a metering device for supplying a cooling liquid, the cooling element (1) having an elongated cooling trough (2), wherein The metering device (5) is connected to the cooling tank (2) by means of a fluid communication (6) on the cooling element (1), characterized in that the fluid communication (6) is arranged on the tank wall (3) of the cooling element (1) above the tank bottom (4) and transversely to the cooling tank (2).

2. The apparatus of claim 1 wherein, The fluid communication (6) passes through the tank wall (3) of the cooling element (1) by means of an outlet tube (7) up to the cooling tank (2) in the area of the thread inlet (8).

3. The apparatus of claim 2 wherein, The outlet end (7.1) of the outlet tube (7) ends flush with the inner contour of the tank wall (3) above the tank bottom (4).

4. The apparatus of claim 2 or 3, wherein The outlet tube (7) is formed from a plastic material and is held in the tank wall (3) of the cooling element (1) by means of a thermally insulating holder (10).

5. The apparatus of claim 4 wherein, A seal (11) is arranged in the tank wall (3) between the outlet end (7.1) of the outlet tube (7) and the thermally insulating holder (10) on the peripheral surface of the outlet tube (7).

6. The apparatus of claim 2 or 3, wherein The outlet tube (7) is connected at the inlet end, which protrudes outside the cooling element (1), to a connection piece (12) with a hose connection (12.1).

7. The apparatus of claim 6 wherein, The outlet tube (7) and the connection piece (12) are integrally formed by means of an L-shaped plug connector (13).

8. The apparatus of claim 7 wherein, The plug connector (13) is held on a housing (15) of the cooling element (1) by means of a clamping holder (14).

9. The apparatus of claim 8 wherein, The housing (15) is formed from a profile (15.1) which is open on one side and an insertion gap (17) is formed between the profile (15.1) and a side plate (16) of the housing (15).

10. The apparatus of any one of claims 1 to 3, wherein, A ceramic insert (18) is arranged downstream of the fluid communication (6) in the direction of movement of the thread, so that it lies in the tank bottom (4) in the cooling tank (2), and the ceramic insert (18) forms a grooved tank bottom (4.1).

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