Apparatus for cooling a plurality of synthetic filaments

Abstract

The invention relates to a device (500) for cooling a plurality of synthetic filaments (26), having a feed housing (1) for feeding in an air stream (L) and a cooling cylinder (7, 700) for radially feeding the air stream (L) as cooling air (K L ) into guide channels (14) of the cooling cylinder, which is configured for cooling the plurality of synthetic filaments (26) by means of the cooling air (K L ), wherein the plurality of synthetic filaments (26) can be guided in the guide channels (14) in an inline guide direction (F), wherein the feed housing (1) is supplied with the air stream (L) by means of an air supply device (12), characterized in that an adjustment region (404) which defines a secondary air channel (50, 500) is defined below the cooling cylinder (7, 700) in the inline guide direction (F), wherein a uniform adjustment of the plurality of synthetic filaments (26) on opposite sides of the secondary air channel can be set by means of secondary air (W S ). The invention also relates to a melt spinning device for melt spinning and cooling a plurality of threads.

Description

Technical Field

[0001] The present invention relates to an apparatus for cooling multiple synthetic filaments, and a related melt spinning apparatus. Background Technology

[0002] It is known from the general prior art that, during the production of synthetic yarns, the synthetic yarn is cooled after extrusion from the polymer melt for curing purposes. Cooling of the filament strands is typically accomplished by a cooling airflow directed towards the newly extruded filament strands. In this process, the cooling airflow is preferably directed from the outside onto the filament strands extruded from the spinneret. A device for cooling multiple bundles of filaments extruded from a spinneret is known from DE 34 24 253 A1. This document describes a spinning apparatus for synthetic fibers, having a bellows and a spindle, wherein cooling of the fibers exiting the spinneret can be achieved by a non-turbulent airflow.

[0003] The disadvantage is that deposits can form between the spinneret and the cooling tank, and these deposits must be removed periodically. Therefore, the cooling tank must be able to be lowered via a lifting device to facilitate cleaning of the spinneret.

[0004] For example, a corresponding lifting device is known from DE 10 2015 012 846 A1. Accordingly, a lifting device is provided between cooling units, below the spinning box. The lifting device has two separate lifting mechanisms, which are assigned to the cooling units. By means of the lifting mechanisms, the cooling units can move back and forth independently between an operating position and a maintenance position.

[0005] The problem here is that a wall section is often provided between the area where the filament is guided and the area where the lifting device is provided, and this wall section prevents the entrained air carried away by the cooling airflow and the extruded filament from acting only on one side of the extruded filament, thereby impairing the quality of the filament. Summary of the Invention

[0006] Therefore, the object of the present invention is to provide a device for cooling filaments, which can prevent the filaments from being trapped by air and cooled on one side.

[0007] Furthermore, the purpose of this invention is to provide a melt spinning apparatus that avoids the aforementioned disadvantages.

[0008] According to the present invention, this objective is achieved by having a device for cooling multiple synthetic filaments.

[0009] The apparatus for cooling multiple synthetic filaments has a feed housing for supplying an airflow and a cooling cylinder for radially supplying the airflow as cooling air into a guide channel of the cooling cylinder. The cooling cylinder is configured to cool the multiple synthetic filaments by means of the cooling air, wherein the multiple synthetic filaments can be guided in a linear guiding direction in the guide channel. The airflow is supplied to the feed housing by means of an air supply device. The apparatus is characterized in that an adjustment region defining a secondary air channel is defined below the cooling cylinder in the linear guiding direction, wherein uniform adjustment of the multiple synthetic filaments can be performed on opposite sides of the secondary air channel by means of the secondary air.

[0010] According to the present invention, the objectives related to the melt spinning apparatus are achieved by means of the following melt spinning apparatus for melt spinning and cooling multiple threads.

[0011] The melt spinning apparatus for melt spinning and cooling multiple filaments has a spinning box having multiple spinneret assemblies on its lower side, and a device for cooling multiple synthetic filaments held on the lower side of the spinning box.

[0012] According to one aspect of the invention, an apparatus for cooling multiple synthetic filaments is provided, the apparatus having a feed housing for supplying an airflow and a cooling cylinder for radially supplying the airflow as cooling air into a guide channel of the cooling cylinder, the cooling cylinder being configured to cool the multiple synthetic filaments by means of the cooling air, wherein the multiple filaments can be guided in the guide channel in a linear guiding direction, wherein the feed housing is supplied with an airflow by means of an air supply device. An adjustment region defining a secondary air channel is defined below the cooling cylinder in the linear guiding direction (F), wherein uniform adjustment of the multiple synthetic filaments can be performed on opposite sides of the secondary air channel by means of the secondary air.

[0013] In this context, the conditioning zone should be understood specifically as the area below the cooling cylinder, through which additional adjustments can be made to the filament, wherein the quality and quantity of secondary air available in the conditioning zone can be set based on the fact that, for example, its inflow rate can be adjusted.

[0014] In this context, secondary air should be understood specifically as entrained air in the filament, which can affect the cooling of the filament and be carried away by the filament.

[0015] In the conditioning zone, it is ensured that the secondary air acts evenly on the filament, resulting in no disadvantages caused by the unilateral action of the secondary air.

[0016] According to one embodiment of the device, the adjustment area has an operating side and a maintenance side, each positioned relative to the guide channel, thereby allowing uniform adjustment of the multiple synthetic lines to be performed on the operating side and the maintenance side by means of secondary air.

[0017] In this context, the operating side should be understood as the area or section that the operator can access for maintenance and setting up the synthesis line in the cooling cylinder area, while the maintenance side should only be accessed at irregular intervals to allow for, for example, maintenance of the cooling cylinder and / or spinneret and the corresponding feed line.

[0018] According to another embodiment of the device, an air supply device is located between the machine housing for extruding the multiple synthetic filaments and the wire outlet of the cooling cylinder.

[0019] This has the advantage that the air supply device is located at a high position, so the maintenance side is not affected by the air feed line, which facilitates the conditional supply of secondary air, thereby allowing the secondary air to have a uniform effect on the synthetic filament.

[0020] According to another embodiment of the device, the adjustable convergence point arranged in the secondary air channel is located below the cooling cylinder in the direction of linear travel.

[0021] Convergence points are used to aggregate synthetic filaments into a thread. Typically, the filaments have already cooled and solidified sufficiently upstream of the convergence point.

[0022] Therefore, it is important that this cooling also occurs uniformly, particularly through the secondary air, which is ensured according to the invention by supplying secondary air to both sides.

[0023] According to one embodiment of the device, the secondary air passage is defined by a first adjusting wall and a second adjusting wall on both sides of the transverse direction of travel.

[0024] The regulating wall also serves to ensure the supply and regulation of secondary air. The regulating wall can be designed as a door, allowing it to be directed into the secondary air passage as needed. If necessary, the regulating wall can also be swung away and removed from the secondary air passage.

[0025] According to another embodiment of the device, the first and / or second regulating walls are designed to allow secondary air to pass through, wherein the secondary air has a certain proportion of line-entrained air and a certain proportion of cooling-entrained air, the line-entrained air being formed during the line removal process, and the cooling-entrained air being formed by a cooling airflow in the line guide channel.

[0026] In each case, the regulating wall is designed in such a way that secondary air can be supplied to the secondary air passage in a controlled manner. This ensures that the filaments are subjected to the secondary air in a uniform manner, thereby preventing unintentional one-sided supply of secondary air.

[0027] According to another embodiment of the device, the first regulating wall and / or the second regulating wall are designed to regulate and / or homogenize the supply of secondary air in a certain section or sections.

[0028] In this context, regulation should be understood in particular as setting the secondary airflow, where turbulent supply of secondary air should be avoided. However, if this is unavoidable, the flow should have consistent characteristics on both sides of the secondary air passage.

[0029] According to another embodiment of the device, the uniform adjustment of multiple synthetic filaments by means of secondary air can be performed substantially symmetrically about the central axis of the cooling cylinder.

[0030] This ensures that the secondary air acts symmetrically on both sides of the synthetic filament about the central axis of the cooling cylinder, resulting in uneven cooling, which can be detrimental in further processing of the synthetic filament, such as during dyeing.

[0031] According to another embodiment of the device, the first and / or second regulating walls are located at the same distance from the central axis of the cooling cylinder. This facilitates a symmetrical distribution of secondary air and a symmetrical supply of secondary air to the device's secondary air passages.

[0032] According to another embodiment of the device, the first and / or second regulating walls for the regulated feed of secondary air have perforated and / or mesh structures in at least some sections. Controlled, predetermined supply of secondary air is possible using the corresponding openings in the regulating walls, thereby enabling more uniform and symmetrically regulated secondary air supply.

[0033] In another embodiment of the device, the feed housing surrounds the cooling cylinder in at least one or more sections, and / or the cooling cylinder surrounds the feed housing in at least one or more sections. Both embodiments describe an arrangement of the feed housing for air inflow into the cooling cylinder, wherein the cooling cylinder concentrically surrounds the wire guide channel and cooling air is supplied via the cooling cylinder, and the filament is also guided within the cooling cylinder; or in another embodiment, air is supplied to the cooling cylinder via the feed housing, which is a blowpipe extending into the cooling cylinder, but no wire or filament is guided within the cooling cylinder.

[0034] According to another embodiment of the device, the air supply device is located in the plane of the feed housing. This provides the advantage that precise, bilateral, uniform, and preferably symmetrical adjustment of the filament by secondary air is possible because the air supply device is not arranged in the area where the secondary air can act on the filament.

[0035] According to another embodiment of the device, the airflow direction defined by the air supply device is substantially the same as the direction of the line guidance in at least one or more sections of the airflow direction.

[0036] This provides the advantage that the air supply unit can be placed in an area that does not impair the secondary air supply.

[0037] According to another aspect of the invention, a melt spinning apparatus for melt spinning and cooling multiple strands is provided, the melt spinning apparatus having a spinning box having a plurality of spinneret assemblies on its lower side, and having means for cooling multiple synthetic strands held on the lower side of the spinning box, wherein the means is designed for cooling multiple synthetic strands according to at least one of the above embodiments.

[0038] The advantage of the available melt spinning apparatus equipped with the means for cooling multiple synthetic yarns according to the invention is that it can produce filaments of good quality because the negative effects caused by the uneven action of secondary air can be eliminated or avoided. Attached Figure Description

[0039] The invention will now be explained in more detail with reference to the accompanying drawings and through several exemplary embodiments of the device according to the invention.

[0040] More specifically:

[0041] Figure 1 A cross-sectional view of an apparatus for cooling multiple synthetic filaments according to the prior art is shown schematically.

[0042] Figure 2 A cross-sectional view of a first embodiment of the present invention for cooling multiple synthetic filaments is shown;

[0043] Figure 3 It shows Figure 2 A plan view of the cooling cylinder in section AA of the first embodiment;

[0044] Figure 4 A schematic landscape view of a second exemplary embodiment of the present invention is shown;

[0045] Figure 5 It shows Figure 4 A plan view of the cooling cylinder in section BB; and

[0046] Figure 6 and 7 An exemplary embodiment of the regulating wall is shown. Detailed Implementation

[0047] exist Figures 1 to 7 In this system, there exists a reference coordinate system in the XYZ directions, which respectively represent the X longitudinal, Y longitudinal, and Z directions of the device or its related components used for cooling multiple composite lines, making it easier to understand the description of their combination.

[0048] Figure 1 An apparatus for cooling multiple synthetic wires according to the prior art is shown.

[0049] A device for cooling multiple synthetic yarns is arranged on a spinning box 20, in which at least one spinneret assembly 21 is arranged. Multiple spinneret assemblies 21 are arranged in series in the X longitudinal direction, so that multiple synthetic yarns can be produced, each synthetic yarn being formed from multiple filaments 26 through the spinneret assembly 21.

[0050] In the following text, the cross-sectional view is explained with reference to a spinning position in each case, since each spinning position preferably has the same design.

[0051] According to the present invention, a plurality of spinneret assemblies 21 may also be provided in the spinning box 20, and these assemblies are equipped with corresponding devices according to the present invention.

[0052] A feed housing 1 is arranged on the spinning box 20. The feed housing supplies material to the cooling cylinder 7, in which the multiple filaments 26 are guided.

[0053] Cooling air K L Air is supplied via the feed housing 1 and the upward-pointing air supply device 12 connected to the feed housing. In this document, "upward-pointing" should be understood as referring to the airflow direction L moving upward in the opposite direction to the linear travel direction F.

[0054] The cooling cylinder 7 has a wire inlet opening 2 through which the plurality of filaments 26 are supplied to the cooling cylinder 7. Cooling air K L The air is supplied to the cooling cylinder 7 via the feed housing and the passage wall 10. The feed housing 1 has a top portion 5 and a bottom portion 4, wherein the bottom portion 4 is connected to the air supply device 12, and the bottom portion surrounds the cooling cylinder 7 annularly or concentrically, thereby allowing the cooling air K supplied therein to flow through. L It can be supplied radially / radially through the channel wall 10.

[0055] The synthetic filament 26 to be cooled exits the cooling cylinder 7 through the filament outlet 15. The convergence point 31 is located below the filament outlet opening 15.

[0056] from Figure 1 As can be seen, on the one hand, the multiple filaments 26 extend to the convergence point 31 through the section below the cooling cylinder 7, and on the other hand, the section is defined by the air supply device 12 and the lifting device 29, which can move the support member 28 back and forth, so that the cooling cylinder 7 can move back and forth between the operating position and the maintenance position.

[0057] In addition, a rear wall guide 30 is arranged between the lifting devices 29. The rear wall guide 30 can be connected to the support 28, thereby changing the position of the convergence point 31 so that the position of the convergence point 31 can be changed according to the production line.

[0058] Due to the unilateral obstruction of the air supply device 12, the rear wall guide 30, and the lifting cylinder 29 of the lifting device, the secondary air W S It can only act on one side of the thread. This may have a negative impact on the dyeing behavior of, for example, threads formed from the multiple filaments 26.

[0059] Therefore, the present invention provides a cooling device having a means 500 for cooling multiple filaments 26, the means having an adjustment region 400 that allows secondary air W to be symmetrically supplied on both sides of the filament travel direction of the synthetic filaments 26. S .

[0060] Figure 2 A first exemplary embodiment of the apparatus 500 is shown. The apparatus 500 according to the invention also has a spinning box 20 in which a spinneret assembly 21 for producing multiple filaments 26 is provided.

[0061] A cooling cylinder 7 with a feed housing 1 is arranged adjacent to the spinning box 20. The feed housing 1 has a top portion 5 and a bottom portion 4. Cooling air K L It is supplied via the bottom portion 4 in the airflow direction L.

[0062] In this embodiment, a downward-pointing air supply device 120 is provided, thereby keeping the area below the air supply device 120 free, allowing entrained air W to be delivered unobstructed from one side of the air supply device 120. S Supply to the regulation zone 400.

[0063] The regulating region 400 has a first regulating wall 40 and a second regulating wall 41 surrounding the convergence point 31, thereby allowing entrained air W S It can act on both sides of the convergence point 31.

[0064] Therefore, the adjusting walls 40 and 41 are arranged at a distance M from the central axis of the cooling cylinder 7. ZAt the same distances b1 and b2, this contributes to the secondary air W S Even supply.

[0065] Figure 3 It shows that according to Figure 2 The cooling cylinder 7 has a cross section AA and is surrounded by a feed housing, which is supplied with air by means of a downward air supply device 120.

[0066] In this document, "downward" means that the airflow L travels along the direction of travel F in at least one or more sections of the downward-pointing air supply device 120, particularly as... Figure 2 As shown.

[0067] Figure 4 Another example of an embodiment of an apparatus for cooling synthetic filaments is shown, wherein the synthetic filaments are specifically used for the production of short fibers. The spinning box 200 has a spinneret assembly 210 with capillaries arranged in the form of circular segments, thereby enabling the extrusion of annular cords from the plurality of filaments 26.

[0068] For this type of filament, the cooling cylinder 700 has a blowpipe that extends into the wire guide channel 14. Here, there is also an adjustment area 400 below the cooling cylinder 700, which has first and second adjustment walls 400, 410, arranged at equal distances b10, b20 and substantially symmetrically with respect to each other. The air supply device 120 is also arranged above the adjustment area 400, thus not impairing the entrained air W. S .

[0069] Figure 5 It shows that according to Figure 4 The cooling cylinder 700 has a cross section BB and is surrounded by a feed housing 100, which is supplied with air by means of a downwardly oriented air supply device 120.

[0070] like Figure 3 and Figure 5 As shown, the feed housing 1 may surround the cooling cylinder 7 in at least one or more sections, or the cooling cylinder 700 may surround the feed housing 1 in at least one or more sections. In each case, this depends on the type of line to be produced and the type of radial cooling provided—from the outside in or from the inside out.

[0071] from Figure 2 and Figure 4It can also be seen that the adjustment area 400 is defined by the operation side B for operating and setting the filament and the maintenance side R for the maintenance device on the maintenance side R, which are each positioned opposite the guide channels 14, 140, thus allowing the secondary air W on both the operation side B and the maintenance side R to pass through. S To set the uniform adjustment of the multiple synthetic filaments 26.

[0072] On both sides of the transverse travel direction F, the secondary air passages 50 and 505 are defined by the first regulating walls 40 and 400 and the second regulating walls 41 and 410.

[0073] The first and / or second adjusting walls 40, 400 are preferably positioned at a distance M from the central axis of the cooling cylinder 7. Z At the same distances b1 and b2. Furthermore, the first and second regulating walls 40 and 400 have the same design, therefore the secondary air W... S It can be supplied to the secondary air channels 50 and 505 in the most uniform and symmetrical manner possible.

[0074] The first regulating walls 40, 400 and / or the second regulating walls 41, 410 are designed to allow secondary air W S The first adjusting walls 40, 400 and / or the second adjusting walls 41, 410 may also be pivotable, allowing the first adjusting walls 40, 400 and / or the second adjusting walls 41, 410 to be opened in a door-like manner.

[0075] Secondary air W S It has a portion of the wire entrained with air W F And a portion of the cooling entrained air, which is formed during the wire removal process, is guided by the cooling air flow K in the wire guide channels 14, 140. L Formation. The entrained secondary air also partially contributes to the cooling and curing of the filament.

[0076] As in Figures 2 to 5 As further schematically shown, the downward-pointing air supply device 120 may have multiple air collection feed sections 17, which allow the target air feed L to enter the associated feed housing 1, 100.

[0077] Each feed housing 1, 100 preferably has a single air collection feed section 17 with a dedicated hose connector 18. In the illustrated embodiment, each hose connector 18 is assigned multiple air collection feed sections 17. However, embodiments in which each hose connector 18 is provided with only one or several air collection feed sections 17 are also possible.

[0078] Figure 6 and 7Exemplary embodiments of regulating walls 40, 41 and 400, 410 are shown respectively. For example, the regulating walls may have perforated and / or mesh structures, through which secondary air can be controlled and fed more efficiently.

[0079] List of reference numerals

[0080] 1 Feed housing

[0081] 2-line entrance opening

[0082] 3 connection channels

[0083] 4. Bottom section

[0084] 5. Top section

[0085] 6 Air Connections

[0086] 7 Cooling cylinders

[0087] 700 Cooling Tank

[0088] 8-hole plate

[0089] 9-line pathway

[0090] 10-channel wall

[0091] 100-channel wall

[0092] 12 upward air supply devices

[0093] 14-line guide channel

[0094] 120 downward air supply device

[0095] 17. Air collection feed section

[0096] 18 Hose Connector

[0097] 140-line guide channel

[0098] 15-line exit opening

[0099] 20 Spinning Box

[0100] 200 spinning box

[0101] 21 Spinneret Assembly

[0102] 210 spinneret assembly

[0103] 26 filament

[0104] 28 support components

[0105] 29 lifting cylinder

[0106] 30 rear wall guide

[0107] 31 meeting points

[0108] 40, 400 First Adjusting Wall

[0109] 41, 410 Second Adjusting Wall

[0110] 404 Adjustment Area

[0111] 500 cooling device

[0112] 50, 505 secondary air passages

[0113] W S Secondary air

[0114] W F Air trapped in the wire

[0115] W L Cooling entrained air

[0116] X-regulated secondary air

[0117] F-line direction of travel

[0118] L airflow direction

[0119] K L Cooling air

[0120] S airflow

[0121] M Z Central axis

[0122] B Operation Side

[0123] R maintenance side

Claims

1. An apparatus (500) for cooling multiple synthetic filaments (26), the apparatus having a feed housing (1) for supplying an airflow (L) and a cooling cylinder (7, 700) for using the airflow (L) as cooling air (K). L Radial supply is provided into the guide channels (14, 140) of the cooling cylinder, which is configured to be used by means of the cooling air (K) L The plurality of synthetic filaments (26) are cooled by means of an air supply device (12), wherein the plurality of synthetic filaments (26) are guided in the guide channel (14, 140) in the line guide direction (F), wherein the feed housing (1) is supplied with an air flow (L) by means of an air supply device (12), characterized in that, The adjustment area (404) of the secondary air passage (50, 505) is defined below the cooling cylinder (7, 700) in the line guiding direction (F), wherein the secondary air (W) can be used to... S To perform uniform adjustment of the multiple synthetic filaments (26) on opposite sides of the secondary air channel.

2. The apparatus according to claim 1, characterized in that, The adjustment area (404) has an operating side (B) and a maintenance side (R), each positioned relative to the guide channel (14, 140), thereby allowing the use of the secondary air (W) S The uniform adjustment of the multiple synthetic filaments (26) is performed on the operating side (B) and the maintenance side (R).

3. The apparatus according to claim 1 or 2, characterized in that, The air supply device (12) is located between the spinning box (20, 200) for extruding the multiple synthetic filaments (26) and the wire outlet opening (15, 150) of the cooling cylinder (7, 700).

4. The apparatus according to claim 1 or 2, characterized in that, An adjustable convergence point (31) arranged in the secondary air passage (50, 505) is located below the cooling cylinder (7, 700) in the direction of line travel (F).

5. The apparatus according to claim 1 or 2, characterized in that, The secondary air passage (50, 505) is defined by a first adjusting wall (40, 400) and a second adjusting wall (41, 410) on both sides transverse to the direction of travel (F).

6. The apparatus according to claim 5, characterized in that, The first regulating wall (40, 400) and / or the second regulating wall (41, 410) are designed to allow secondary air (W) S ) through, wherein the secondary air has a certain proportion of entrained air (W) F ) and a certain proportion of cooling entrained air, the entrained air being formed during the removal of the wire, the cooling entrained air being formed by cooling air (K) in the wire guide channels (14, 140). L The flow is formed.

7. The apparatus according to claim 5, characterized in that, The first regulating wall (40, 400) and / or the second regulating wall (41, 410) are designed to regulate and / or homogenize secondary air (W) in a certain section or sections. S ) supply.

8. The apparatus according to any one of claims 1-2 and 6-7, characterized in that, With the help of secondary air (W S The uniform adjustment of the multiple synthetic filaments (26) about the central axis (M) of the cooling cylinder Z It is executed in a basically symmetrical manner.

9. The apparatus according to claim 5, characterized in that, The first adjusting wall (40, 400) and / or the second adjusting wall are located at a distance from the central axis (M) of the cooling cylinder. Z At the same distance (b1, b2).

10. The apparatus according to claim 5, characterized in that, The first regulating wall (40, 400) and / or the second regulating wall (41, 410) for the regulated supply of secondary air have perforations and / or mesh structures in at least one or more sections.

11. The apparatus according to any one of claims 1-2, 6-7, and 9-10, characterized in that, The feed housing (1) surrounds the cooling cylinder in at least one or some sections, and / or the cooling cylinder surrounds the feed housing (1) in at least one or some sections.

12. The apparatus according to any one of claims 1-2, 6-7 and 9-10, characterized in that, The air supply device (12) is located in the plane of the feed housing (1).

13. The apparatus according to any one of claims 1-2, 6-7, and 9-10, characterized in that, The airflow direction (S) defined by the air supply device (12) extends in at least a certain section or some sections in a direction substantially the same as the direction of the line guiding direction (F).

14. A melt spinning apparatus for melt spinning and cooling multiple filaments, the melt spinning apparatus having a spinning box (20, 200) having a plurality of spinneret assemblies (21, 210) on its lower side, and having means (500) for cooling multiple synthetic filaments (26) held on the lower side of the spinning box, characterized in that, The device (500) for cooling the multiple synthetic filaments (26) held on the lower side of the spinning box is designed according to any one of claims 1 to 13.

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