Cooling device for monofilament spinning

Abstract

The application discloses a cooling device for monofilament spinning, which comprises a cooling tank, a liquid injection port is arranged at the lower part of the cooling tank, a transparent barrier protection cover is arranged on the top of the cooling tank, a receiving and separating roller is arranged at the deep cooling water of the cooling tank, and a guide rod is arranged at the outlet end of the cooling tank, the receiving and separating roller is used for receiving the monofilament extruded by a spinning box body above one end of the cooling tank, the monofilament winding around the receiving and separating roller downwards is in S-shaped arrangement along the length direction of the cooling tank in the cooling liquid, the monofilament is alternately cooled and solidified in different temperature areas of the cooling liquid, and finally the monofilament is guided out from the guide rod at the other end of the cooling tank. The liquid is supplied upwards through the liquid injection port arranged at the lower part, the monofilament enters the low-temperature water area from the high-temperature water area, and the monofilament cooling and solidification is beneficial; the transparent barrier protection cover arranged on the top can collect the cooling steam and concentrate in the overflow tank, and the stability of the monofilament cooling liquid is improved; and the cooling device can improve the quality and stability of the monofilament cooling and setting.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of spinning cooling equipment, in particular to a cooling device for single filament spinning. BACKGROUND

[0002] In the production process of single filament, the raw material melt in molten state is transported into the spinning box through the conveying channel, extruded into a filament bundle through the spinneret in the spinning box, then cooled and solidified through the cooling device, and finally wound into a shape. In the prior art, the cooling tank is in the form of an opening, and the liquid inlet is above and the liquid outlet is below. The temperature of the water in the tank increases from the water surface to the bottom of the tank. When the single filament is extruded from the spinning box into the cooling tank, it first enters the low-temperature water area and then enters the high-temperature water area, so that the surface layer of the single filament is quickly solidified while the core layer is still in a molten state, which easily causes the single filament to have a skin-core structure, thereby affecting the strength and uniformity of the single filament. The fluctuations caused by the water entering the cooling tank from the liquid inlet also affect the structure and performance of the single filament. In addition, the cooling water cools the high-temperature single filament, causing the temperature of the cooling water to rise and heat to the air, which not only increases the temperature and humidity of the production workshop, making the single filament production environment unstable, but also makes it difficult for workers to approach the cooling pool to check the cooling state of the single filament, reducing production efficiency. SUMMARY

[0003] The purpose of the present application is to provide a cooling device for single filament spinning to solve the problems existing in the prior art.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] A cooling device for single filament spinning, comprising a cooling tank, the lower part of the cooling tank is provided with a liquid inlet, and the top of the cooling tank is covered with a barrier protection cover. A receiving and separating roller is arranged at the deep cooling water position in the cooling tank, and a guide rod is arranged at the outlet end of the cooling tank. The receiving and separating roller is used to receive the single filament extruded from the spinning box above one end of the cooling tank. The single filament winding around the receiving and separating roller presents an S-shaped trajectory in the length direction of the cooling tank in the cooling liquid. The single filament alternately passes through different temperature zones of the cooling liquid for cooling and solidification, and finally the single filament is guided out of the guide rod at the other end of the cooling tank.

[0006] The liquid inlet is arranged at the lower part of the cooling tank, so that the cooling liquid temperature in the cooling tank presents a temperature rising state from low to high from the lower part to the upper part. The single filament with S-shaped trajectory alternately passes through the lower low-temperature zone and the upper high-temperature zone. The cooling and solidification of the single filament in the upper and lower stepped temperature range of the cooling liquid can ensure the stability and effectiveness of the cooling and solidification.

[0007] The liquid injection ports are arranged on the side wall of the cooling tank, and are arranged in the area between the receiving and separating roller and the guide rod, and are arranged lower than the receiving and separating roller; the diameter of the liquid injection port is not greater than 2 cm; and the number of the liquid injection ports arranged on the single side wall of the cooling tank is not less than four.

[0008] The cooling tank is provided with at least one intermediate separating roller through which the single yarn passes, and the intermediate separating roller cooperates with the receiving and separating roller to make the single yarn present an S-shaped trend in the cooling liquid; when the number of the intermediate separating rollers is one, the position of the intermediate separating roller is higher than that of the receiving and separating roller; when the number of the intermediate separating rollers is more than two, the intermediate separating roller adjacent to the receiving and separating roller is arranged higher than the receiving and separating roller, and the heights of the adjacent intermediate separating rollers are different.

[0009] Generally, the receiving and separating roller at the lower position and the adjacent intermediate separating roller at the higher position are taken as a group, and the remaining intermediate separating rollers at the lower position and the intermediate separating rollers at the higher position are taken two by two as a group, so that at least one group of separating rollers with different heights is arranged, and when the single yarn is extruded from the spinning beam into the cooling tank, the single yarn is first wound around the lowest receiving and separating roller, then is wound around the adjacent intermediate separating roller at the obliquely upper position, and then is wound around the adjacent intermediate separating roller at the obliquely lower position, and the single yarn is wound around the receiving and separating roller and the intermediate separating roller in an S-shaped trend along the length direction of the cooling tank, and then is guided out from the guide rod, so that the single yarn is cooled and solidified in the up-and-down stepped temperature range of the cooling liquid, and the sudden cooling of the single yarn is avoided to prevent the appearance of the skin-core structure.

[0010] In addition, in order to improve the stability of the single yarn output, a transition separating roller is arranged between the intermediate separating roller adjacent to the guide rod and the guide rod.

[0011] The upper portion of the receiving and separating roller is provided with a plurality of inverse wave sheets arranged at intervals, each inverse wave sheet is fixed vertically and equidistantly on a support seat, the support seat is fixed on the side wall of the cooling tank or the overflow plate, the inverse wave sheet is made of a copper sheet or an aluminum sheet with a thickness of 1 mm to 5 mm, or the inverse wave sheet is made of a damping sheet; the single yarn extruded from the spinning beam enters the cooling liquid downward, and each single yarn passes through the middle of the corresponding two adjacent inverse wave sheets to reach the receiving and separating roller, so as to reduce the influence of the water wave caused by the single yarn entering the cooling liquid on the uniformity of the solidification of the single yarn, and to reduce the mutual influence between the single yarns.

[0012] The cooling tank is equipped with an overflow trough, which is used to receive the coolant overflowing from the cooling tank and the condensate collected by the barrier cover. The overflow trough is located on the outside of one end of the cooling tank or inside the cooling tank, with the overflow trough located at the end of the cooling tank away from the guide rod. A liquid outlet is provided in the middle and lower part of the overflow trough. Both the liquid inlet and the liquid outlet are located below the surface of the coolant. The liquid outlet is connected to the liquid inlet through a pipe for installing the cooling mechanism, so that the liquid exiting the cooling tank is cooled and then returned to the cooling tank, realizing the recycling of the coolant.

[0013] When the overflow trough is located inside the cooling tank, it can be achieved by adding an overflow plate, the height of which is flush with the coolant level in the cooling tank. When the overflow trough is located outside the end of the cooling tank, a portion of the end wall of the corresponding cooling tank needs to be cut off so that the end wall is lower than the side wall to serve as the overflow plate.

[0014] The overflow plate of the overflow trough or the side wall of the cooling trough is equipped with a support for fixing the reverse wave plate.

[0015] The bottom of the cooling water tank is equipped with multiple heating tubes, which are located below the liquid injection port; when the temperature of the cooling liquid in the cooling tank is lower than the set temperature value, the heating tubes are heated.

[0016] The aforementioned barrier cover comprises a front baffle, a rear baffle, an outlet baffle, a spinning end baffle, an upper cover, a front support groove, and a rear support groove. The front support groove and the rear support groove are respectively fixedly installed on the front and rear edges of the cooling tank, with one end of the front support groove and the other end unsealed. The unsealed end extends above the overflow groove provided at one end of the cooling tank. The front baffle and the rear baffle are respectively vertically fixed on the outer sides of the front support groove and the rear support groove. The outlet baffle and the spinning end baffle are respectively installed at both ends of the front baffle and the rear baffle, and the bottom of the outlet baffle is hollowed out to allow the monofilament to pass through to the guide rod. The four edges of the arc-shaped upper cover are respectively sealed and connected to the front baffle, the rear baffle, the outlet baffle, and the spinning end baffle.

[0017] The barrier protection cover is a whole covering structure or a large covering structure, when the barrier protection cover is the whole covering structure, the barrier protection cover can cover the whole opening part of the cooling tank, at this time, the upper cover plate is provided with an opening for the lower part of the spinning beam to insert; when the barrier protection cover is the large covering structure, the barrier protection cover covers the opening part of the cooling tank between the spinning beam and the guide rod, at this time, the spinning end baffle is arranged close to the spinning beam and the front support groove and the rear support groove are extended to the overflow groove arranged at one end of the cooling tank; the plate surface structure of the front baffle, the rear baffle, the outlet end baffle, the spinning end baffle and the upper cover plate comprises, from inside to outside, a fog prevention layer, a water vapor barrier layer and a base material layer, and the fog prevention layer, the water vapor barrier layer and the base material layer are formed into a composite sheet structure by three different resin raw materials through multi-layer co-extrusion.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] The present application avoids the problem of uneven solidification of the single yarn surface caused by water waves of the single yarn entering the cooling liquid by setting the reverse wave sheet in the cooling tank to separate each single yarn extruded from the spinning beam.

[0020] The present application makes the single yarn pass through the filament separating roller in the length direction of the cooling tank to cool in an S-shaped path, so that it is solidified and shaped in a stepped temperature range, improves the stability of the single yarn cooling from the surface layer to the inner layer, and prevents the single yarn from appearing skin-core structure caused by sudden cooling.

[0021] The present application sets the overflow groove in the cooling tank, one side of the overflow groove is flush with the liquid level in the cooling tank, the liquid outlet is in the side wall of the overflow groove and below the cooling liquid level, the liquid inlet is in the form of a small number of small diameters below the side wall of the cooling tank close to the bottom, which reduces the influence of the fluctuations of water injection and water outlet on the cooling and shaping of the single yarn, and is beneficial to improve the quality of the single yarn product.

[0022] The present application separates the surrounding environment from the cooling tank by fixing the barrier protection cover on the cooling tank to ensure the stability of the surface temperature of the cooling liquid in the cooling tank; the upper cover plate of the barrier protection cover is arc-shaped, and the upper cover plate is connected with the front baffle and the rear baffle, and the front baffle and the rear baffle are connected with the front support groove and the rear support groove; when the hot gas generated in the cooling process of the single yarn causes condensation water droplets on the panel of the barrier protection cover, the arc-shaped upper cover plate can make the condensation water droplets enter the front support groove and the rear support groove along the arc, and then enter the overflow groove through the opening at the joint of the groove and the overflow groove, so as to avoid the condensation water droplets on the cover plate directly falling into the cooling tank to generate water waves and affect the quality stability of the single yarn being cooled and shaped.

[0023] The panel structure of the barrier protective cover comprises, from inside to outside, a fog-proof layer, a water vapor barrier layer and a substrate layer, so that the barrier protective cover has excellent fog-proof effect, can make the staff clearly observe the state of the filaments passing through the cooling tank at close range without the interference of water vapor, can effectively block the hot gas in the cooling tank from entering the filament spinning workshop, thereby avoiding affecting the overall temperature and humidity of the spinning workshop and ensuring the stability of the spinning production. BRIEF DESCRIPTION OF DRAWINGS

[0024] BRIEF DESCRIPTION OF DRAWINGS Figure 1 The side structure schematic diagram of the overall covering type filament spinning cooling tank device provided by the present application is shown in the figure.

[0025] BRIEF DESCRIPTION OF DRAWINGS Figure 2 The side structure schematic diagram of the large part covering type filament spinning cooling tank device provided by the present application is shown in the figure.

[0026] BRIEF DESCRIPTION OF DRAWINGS Figure 3 The cross-sectional structure schematic diagram of the filament spinning cooling tank device provided by the present application is shown in the figure.

[0027] BRIEF DESCRIPTION OF DRAWINGS Figure 4 The structure schematic diagram of the barrier protective cover in the filament spinning cooling tank device provided by the present application is shown in the figure.

[0028] BRIEF DESCRIPTION OF DRAWINGS Figure 5 The panel structure schematic diagram of the barrier protective cover in the filament spinning cooling tank device provided by the present application is shown in the figure.

[0029] 1-cooling tank; 2-overflow tank; 4-liquid injection port; 5-liquid outlet; 6-guide rod; 7-heating pipe; 8-barrier protective cover; 9-spinning box; 10-filament; 11-reverse wave sheet; 21-fog-proof layer; 22-water vapor barrier layer; 23-substrate layer; 31-accepting filament dividing roller; 32-intermediate filament dividing roller; 33-transition filament dividing roller; 81-front side baffle; 82-rear side baffle; 83-outlet end baffle; 84-spinning end baffle; 85-upper cover plate; 86-front support groove; 87-rear support groove. EMBODIMENT

[0030] The present application will be further described below in combination with the drawings and examples.

[0031] The present application provides a filament spinning cooling device, which comprises a cooling tank, a barrier protective cover and a spinning box. Figure 1 , Figure 2 , Figure 3As shown, the cooling tank 1 includes a cooling tank 1, an overflow tank 2, a filament separating roller 3, a liquid injection port 4, a liquid outlet 5, a guide wire rod 6, a heating pipe 7 and an inverse wave sheet 11. The inner side of one end of the length direction of the cooling tank 1 is provided with the overflow tank 2. The outer side baffle of the overflow tank 2 adopts the end plate of the cooling tank 1, or adopts a baffle adjacent to the end plate of the cooling tank 1 and the height of the outer side baffle is flush with the height of the cooling tank 1. The inner side baffle of the overflow tank 2 serves as an overflow plate, and the height of the overflow plate is flush with the liquid level of the cooling liquid in the cooling tank 1. A plurality of inverse wave sheets 11 are arranged in the cooling tank 1 at intervals. Each inverse wave sheet 11 is fixed vertically on a support seat at equal distances. The support seat is fixed on the side wall of the cooling tank 1 or on the overflow plate, so that each single wire 10 extruded into the cooling tank 1 passes through the middle of the corresponding two inverse wave sheets 11, thereby reducing the influence of water waves caused by the single wire 10 entering the cooling liquid on the uniformity of the solidification of the single wire 10. Three groups of filament separating rollers are arranged at intervals at different height positions of the inner side wall of the cooling tank 1. Each group of filament separating rollers is provided with two filament separating rollers at different heights, so that when the single wire 10 is extruded from the spinning beam 9 into the cooling tank 1, it is first wound around the lowermost receiving filament separating roller 31, then wound around the middle filament separating roller 32 adjacent to the receiving filament separating roller 31 and located in the obliquely upper position, and then wound around the second middle filament separating roller 32 adjacent to the first middle filament separating roller 32 and located in the obliquely lower position. In this way, the single wire 10 is wound around all the filament separating rollers in an S-shaped manner along the length direction of the cooling tank 1, and then is guided out of the guide wire rod 6 through the transition filament separating roller 33, so that the single wire 10 is cooled and solidified in the up-down stepped temperature range of the cooling liquid, thereby avoiding sudden cooling to cause the single wire to have a skin-core structure. A plurality of liquid injection ports 4 located below the rear side of the receiving filament separating roller 31 are arranged at intervals at the lower position of the inner side wall of the cooling tank 1. The liquid outlet 5 is located at the lower position of the inner side wall of the overflow tank 2. The liquid injection port 4 and the liquid outlet 5 are both below the liquid level.

[0032] Further optimize the above technical solution, the upper and lower two filament separating rollers constitute a group, Figure 1 and Figure 2 The filament separating rollers arranged in the cooling tank 1 have three groups: the receiving filament separating roller 31 and the first middle filament separating roller 32 form a group, and the remaining four middle filament separating rollers 32 form two groups.

[0033] Further optimize the above technical solution, the inverse wave sheet 11 is an aluminum sheet with a thickness ranging from 2mm; the diameter of the liquid injection port 4 is 1.5cm, and it is arranged at equal distances on the inner side walls of the two sides of the cooling tank 1. There are five liquid injection ports on each side wall.

[0034] Further optimize the above technical solution, the liquid injection port 4 and the liquid outlet 5 are connected through a pipeline with a cooling mechanism, so that the liquid discharged from the cooling tank 1 is cooled and then returned to the cooling tank 1, realizing the recycling of the liquid.

[0035] Further optimize the above technical scheme, the bottom of the cooling tank 1 is provided with a heating pipe 7, when the cooling liquid temperature in the cooling tank 1 is lower than the set temperature value, the heating pipe 7 heats until the set cooling temperature value and stops working.

[0036] In order to further optimize the above technical scheme, the cooling tank 1 is also provided with a barrier protection cover 8 of the overall covering structure as shown in Figure 4 The front support groove 86 and the rear support groove 87 are vertically fixed on the front and rear edges of the cooling tank 1 respectively; the front side baffle 81 and the rear side baffle 82 are vertically fixedly connected with the front support groove 86 and the rear support groove 87 respectively; the two ends of the outlet end baffle 83 are connected with the front ends of the front side baffle 81 and the rear side baffle 82 respectively, and the outlet end baffle 83 is vertically erected on the edge of the cooling tank 1, and the lower end of the outlet end baffle 83 is hollow, so that the filaments 10 can pass out of the cooling tank 1 and be pulled to the winding forming area; the two ends of the spinning end baffle 84 are connected with the rear ends of the front side baffle 81 and the rear side baffle 82 respectively, and the spinning end baffle 84 is vertically erected on the edge of the cooling tank 1; the upper cover plate 85 is arc-shaped, and the four edges of the upper cover plate 85 are sealingly connected with the front side baffle 81, the rear side baffle 82, the outlet end baffle 83 and the spinning end baffle 84 respectively, and the upper cover plate 85 is provided with an opening for inserting the spinning box 9.

[0037] Further optimize the above technical scheme, the front support groove 86 and the rear support groove 87 are not sealed at the end adjacent to the overflow tank 2, so that the liquid in the front support groove 86 and the rear support groove 87 can directly flow into the overflow tank 2; further, the rear end inner side bottom of the front support groove 86 and the rear support groove 87 is provided with a leakage hole, or the lower edge of the two ends of the spinning end baffle 84 is provided with an opening, so that the condensate in the front support groove 86 and the rear support groove 87 can flow into the overflow tank 2.

[0038] As shown in Figure 5 Further optimize the above technical scheme, the panel structure of the barrier protection cover 8 comprises a fog prevention layer 11, a water vapor barrier layer 12 and a base material layer 13 from inside to outside in sequence, and is formed into a composite sheet structure by three different resin raw materials through multi-layer co-extrusion; so that it has excellent fog prevention effect, not only can the staff clearly observe the state of the filaments passing through the cooling tank without the interference of water vapor, but also can effectively block the hot air in the cooling tank from entering the filament spinning workshop, so as to avoid affecting the overall temperature and humidity of the spinning workshop and ensure the stability of the spinning production.

[0039] The cooling device for monofilament spinning provided by the application preheats the cooling liquid to 70℃±3℃ before starting work; during stable operation, the temperature of the monofilament 10 output by the spinning box 9 is as high as 200℃ or above, and the cooling liquid with low temperature is continuously injected from the liquid injection port 4, and the cooling liquid with high temperature flows into the overflow tank 2 and is output from the liquid outlet 5, so that the cooling liquid in the cooling tank 1 has a stepped temperature range, the temperature of the cooling liquid where the monofilament 10 just enters the area of the inverse wave sheet 11 is as high as 80℃-90℃, the temperature of the cooling liquid where the monofilament 10 is received by the filament receiving roller 31 is 50℃-70℃, the temperature of the cooling liquid where the monofilament 10 is received by the middle filament receiving roller 32 is 20℃-30℃, and the temperature of the cooling liquid where the monofilament 10 is received by the high middle filament receiving roller 32 is 70℃±3℃, so that the S-shaped path of the monofilament 10 has a stepped temperature, and the monofilament 10 is solidified and shaped in the stepped temperature range, thereby improving the stability of the cooling of the monofilament from the surface layer to the inner layer.

[0040] Specifically, as shown in the accompanying drawings, Figures 1-5 The working principle of the embodiment is as follows: in the polyester monofilament spinning process, first, the temperature of the cooling liquid in the cooling tank 1 is preheated to 70℃±3℃. After the cooling tank 1 is connected to the power supply, according to the temperature display of the cooling liquid, the bottom heating pipe 7 is used to heat the cooling liquid until the set temperature value is reached, and then the heating is stopped.

[0041] Secondly, after the monofilament 10 is extruded from the spinning box 9 and enters the cooling tank 1, each monofilament is separated by the inverse wave sheet 11 to avoid the influence of the water waves generated when the monofilament 10 enters the cooling liquid on the solidification effect of the monofilament 10. The monofilament 10 entering the cooling liquid first passes around the bottommost filament receiving roller 31, and then around the adjacent middle filament receiving roller 32, and then sequentially around the three groups of filament receiving rollers in an S-shaped path, and then passes out of the cooling liquid through the transition filament receiving roller 33 and is guided out to the next process through the guide rod 6. Because the cooling liquid with different depths has different temperatures, the cooling process of the monofilament 10 is solidified and shaped through a stepped temperature, thereby reducing the frequency of the skin-core structure of the monofilament 10.

[0042] During the cooling process of the monofilament 10, the liquid injection port 4 continuously injects water into the cooling tank 1 in the form of a small-diameter multiple number, reducing the influence of the water waves brought by the water injection on the cooling and shaping of the monofilament 10. The overflow plate of the overflow tank 2 is flush with the liquid level of the cooling tank 1, and the overflow tank 2 drains the cooling tank 1 through the liquid outlet 5, thereby reducing the influence of the water waves brought by the water outlet on the solidification and shaping process of the monofilament 10. The cooling liquid discharged from the liquid outlet 5 enters the cooling mechanism through the pipeline, is cooled to a certain temperature, and then reenters the cooling tank 1 from the liquid injection port 4, realizing the recycling of the liquid.

[0043] The barrier shield 8 completely covers the opening of the cooling tank 1. During the single filament 10 passing through the cooling liquid, the temperature of the single filament 10 is cooled from above 200℃ to about 70℃, and the hot gas of the cooling liquid rises to form condensate water beads on the inner surface of the barrier shield 8. Since the upper cover plate 85 of the barrier shield 8 is in an arc structure, the condensate water beads slide along the arc structure under the action of surface tension to the front support groove 86 and the rear support groove 87, and flow into the overflow tank 2, avoiding the condensate water beads directly falling into the cooling tank 1 to cause water fluctuation and thus affecting the cooling and setting quality and stability of the single filament 10. At the same time, since the inner surface layer of the barrier shield 8 has a defogging function, the generation of condensate water beads is greatly reduced.

[0044] In addition, due to the use of the barrier shield 8, not only the hot gas generated during the cooling and setting of the single filament 10 in the cooling tank 1 is effectively blocked, but also the stability of the ambient temperature in the cooling tank 1 is ensured. The defogging performance of the inner layer of the barrier shield 8 not only effectively avoids the discomfort of the staff caused by the steam, but also enables the staff to closely observe the cooling state of the single filament 10 and timely find problems in production. At the same time, the efficient blocking of the hot gas ensures the stability of the temperature and humidity in the spinning workshop, which is beneficial to the stability of the processing and production of the single filament 10.

[0045] The above examples only illustrate the technical idea of the present application, and cannot limit the protection scope of the present application. Any modification made according to the technical idea of the present application on the basis of the technical scheme falls within the protection scope of the present application; the technologies not involved in the present application can be realized by the existing technologies.

Claims

1. A cooling device for monofilament spinning, comprising a cooling tank (1), characterized in that: The cooling tank (1) is provided with a liquid injection port (4) at the bottom and a barrier protective cover (8) at the top. A receiving splitting roller (31) is provided deep in the cooling water in the cooling tank (1) and a guide rod (6) is provided at the outlet end of the cooling tank (1). The receiving splitting roller (31) is used to receive the monofilaments (10) extruded from the spinning box (9) located above one end of the cooling tank (1). The monofilaments (10) that pass down and around the receiving splitting roller (31) are arranged in an S-shape along the length of the cooling tank (1) in the cooling liquid. The monofilaments (10) alternately pass through different parts of the cooling liquid. Cooling and solidification are carried out within the temperature range, and finally the monofilament (10) is led out from the guide rod (6) at the other end of the cooling tank (1); the cooling tank (1) is provided with at least one intermediate splitting roller (32) for the monofilament (10) to pass through, the intermediate splitting roller (32) and the receiving splitting roller (31) cooperate with each other to make the monofilament (10) follow an S-shaped path in the coolant; when there are two or more intermediate splitting rollers (32), the intermediate splitting roller (32) adjacent to the receiving splitting roller (31) is set higher than the receiving splitting roller (31) and the heights of the adjacent intermediate splitting rollers (32) are different; Above the receiving splitting roller (31), there are several anti-wave plates (11) spaced apart. The monofilaments (10) extruded from the spinning box (9) enter the cooling liquid downwards. Each monofilament (10) passes through the middle of two adjacent anti-wave plates (11) to reach the receiving splitting roller (31) and the monofilaments (10) do not affect each other. The cooling tank (1) is provided with an overflow tank (2), and the overflow tank (2) has a liquid outlet (5) in the middle and lower part. The bottom of the cooling tank (1) is provided with multiple heating tubes (7); Before the cooling device for monofilament spinning starts working, the cooling liquid must be preheated to 70℃±3℃. During stable operation, the coolant with low temperature is continuously injected from the injection port (4), and the coolant with high temperature overflows into the overflow tank (2) and is output from the outlet (5). Therefore, the coolant in the cooling tank (1) has a stepped temperature range. The coolant temperature in the area of ​​the reverse wave plate (11) is as high as 80℃-90℃, the coolant temperature in the area of ​​the receiving splitting roller (31) is 50℃-70℃, the coolant temperature in the area of ​​the intermediate splitting roller (32) at the lower position is 20℃-30℃, and the coolant temperature in the area of ​​the intermediate splitting roller (32) at the higher position is 70℃±3℃. This results in a stepped temperature along the S-shaped path of the monofilament (10), which is then solidified and shaped within the stepped temperature range, improving the stability of the monofilament cooling from the surface to the inner layer.

2. The cooling device for monofilament spinning according to claim 1, characterized in that: The injection ports (4) are spaced apart on the side wall of the cooling tank (1). The injection ports (4) are located in the area between the receiving splitting roller (31) and the guide rod (6) and the injection ports (4) are set lower than the receiving splitting roller (31). The diameter of the injection ports (4) is not greater than 2cm. There are no less than four injection ports (4) on one side wall of the cooling tank (1).

3. The cooling device for monofilament spinning according to claim 1, characterized in that: An intermediate splitting roller (32) is provided between the guide rod (6) and the intermediate splitting roller (33).

4. The cooling device for monofilament spinning according to claim 1, characterized in that: The reverse wave plate (11) is made of copper or aluminum with a thickness of 1mm to 5mm; or the reverse wave plate (11) is made of damping plate.

5. The cooling device for monofilament spinning according to any one of claims 1-3, characterized in that: The overflow trough (2) is used to receive the coolant overflowing from the cooling tank (1) and the condensate collected by the barrier shield (8); the overflow trough (2) is set on the outside of one end of the cooling tank (1) or set inside the cooling tank (1) and the overflow trough (2) is located at the end of the cooling tank (1) away from the guide rod (6); the liquid outlet (5) is connected to the liquid injection port (4) through the pipe for installing the cooling mechanism, so that the liquid coming out of the cooling tank (1) returns to the cooling tank (1) after being cooled, thereby realizing the recycling of the cooling liquid.

6. The cooling device for monofilament spinning according to any one of claims 1-3, characterized in that: The heating tube (7) is located below the liquid injection port (4); when the temperature of the cooling liquid in the cooling tank (1) is lower than the set temperature value, the heating tube (7) heats up.

7. The cooling device for monofilament spinning according to any one of claims 1-3, characterized in that: The aforementioned barrier shield (8) is composed of a front baffle (81), a rear baffle (82), an outlet baffle (83), a spinning end baffle (84), an upper cover (85), a front support groove (86), and a rear support groove (87). The front support groove (86) and the rear support groove (87) are respectively fixedly installed on the front and rear edges of the cooling tank (1), and one end of the front support groove (86) and the rear support groove (87) is sealed, while the other end is not sealed. The unsealed end extends to the top of the overflow groove (2) provided at one end of the cooling tank (1); the front baffle (81) 1) The rear side baffle (82) is vertically fixed on the outside of the front support groove (86) and the rear support groove (87) respectively; the outlet end baffle (83) and the spinning end baffle (84) are respectively installed at the two ends of the front side baffle (81) and the rear side baffle (82), and the bottom of the outlet end baffle (83) is hollowed out to allow the monofilament (10) to pass through to the guide rod (6). The four edges of the arc-shaped upper cover plate (85) are respectively sealed and connected to the front side baffle (81), the rear side baffle (82), the outlet end baffle (83), and the spinning end baffle (84).

8. The cooling device for monofilament spinning according to claim 7, characterized in that: The barrier cover (8) is an overall covering structure or a large covering structure. When the barrier cover (8) is an overall covering structure, the barrier cover (8) can cover the entire opening of the cooling tank (1). At this time, the upper cover plate (85) is provided with an opening for the lower part of the spinning box (9) to be inserted. When the barrier shield (8) is a large-scale covering structure, the barrier shield (8) covers the opening of the cooling tank (1) in the area between the spinning box (9) and the guide rod (6). At this time, the spinning end baffle (84) is set close to the spinning box (9), and the front support groove (86) and the rear support groove (87) extend to the overflow groove (2) set at one end of the cooling tank (1). The plate structure of the front baffle (81), the rear baffle (82), the outlet end baffle (83), the spinning end baffle (84) and the upper cover plate (85) includes, from the inside to the outside, an anti-fog layer, a water vapor barrier layer (12) and a substrate layer (13).

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