A water tank for spinning

Abstract

The utility model relates to a water tank for spinning, more than one guide roller is rotatably arranged in the water tank, the guide roller is distributed along the walking direction of nascent yarn, the nascent yarn passes through each guide roller alternately, the inner side yarn of the roller surface of the bundle close to a guide roller becomes the outer side yarn of the roller surface far away from the adjacent guide roller, and each guide roller is connected with a driving mechanism. The utility model increases the contact point and contact area of the nascent yarn and the roller surface for spinning by more than one guide roller, disperses the tension, and more than one guide roller changes the direction of the tension while changing the direction of the nascent yarn, significantly reduces the skidding phenomenon, and the guide yarn stability is improved through the spinning production test.

Description

Technical Field

[0001] This utility model relates to the technical field of ultra-high molecular weight polyethylene fiber production process, and in particular to a water tank for spinning. Background Technology

[0002] In fiber production, the fineness stability of finished yarn is expressed by CV%. Generally, the fineness index is less than 5%, but if this value can be stabilized below 2%, it means that the fiber fineness has stronger consistency, and thus the quality of the final fiber product also has better stability.

[0003] Factors that may affect fiber fineness permeate almost the entire fiber production process. During the process of the patent applicant organizing efforts to achieve CV% < 2%, the length of the homogenization section of the screw press, the stability of the die head pressure, the accuracy of the metering pump, the stability of the motor speed, the drawing machine, and even the winding machine were all investigated, but the target of CV% < 2% could not be achieved.

[0004] On the other hand, in fiber production processes, the high-temperature nascent filaments need to be cooled by a water bath. Existing technologies use a guide roller immersed in a water tank to guide the nascent filaments through the tank, achieving this water bath effect. Initially, this guide roller was rotatably mounted in the tank via bearings, rotating with the filament as it passed through. However, those skilled in the art recognized that with the fiber moving actively and the guide roller passively, relative motion would occur between the fiber and the roller, potentially causing the filament to be scratched by uneven surfaces on the roller. Therefore, the process was modified to allow the filament and roller to move synchronously. Although the inventors of the water tank patents with authorization announcement numbers CN 201442995U, CN 202380139 U, and CN 220952221 U have made improvements in different directions regarding the structural composition, connection relationship, and positional relationship of the water tank, none of them have made any changes to the guide rollers themselves or the number of guide rollers. For those skilled in the art, the guide rollers only serve to guide the nascent filaments into the water tank, and they themselves do not have any adverse effects on the properties of the nascent filaments, nor is there any room for improvement.

[0005] While reviewing historical data on finished yarn, the inventors of this invention inadvertently discovered that the fineness index of finished yarn produced on new production lines was significantly lower than that of finished yarn produced on later production lines on the same line. Similar phenomena also occurred after the water bath guide rollers were replaced. Through continuous and meticulous observation, the inventors further discovered that the solvent oil contained in the nascent yarn would be pressurized during the water bath, gradually contaminating the roller surface. Furthermore, the water bath operation caused the solvent oil to reach a near-solidified state, and the gradual accumulation of solvent oil on the roller surface reduced the coefficient of friction between the roller surface and the nascent yarn. In addition, in the past, to avoid relative slippage between the nascent yarn and the guide roller, the diameter of the guide roller was increased. As a result, the tension experienced by the inner yarn close to the roller surface and the outer yarn far from the roller surface of the nascent yarn bundle was different, and relative slippage would also occur between the inner and outer yarns. In a water bath environment, these factors may lead to a decrease in fineness stability. Summary of the Invention

[0006] The purpose of this utility model is to provide a spinning water tank that does not adversely affect the stability of fiber fineness, which is achieved by the following technical solution: A spinning water tank has more than one guide roller rotatably arranged inside the water tank. The guide rollers are distributed along the direction of the nascent filament travel, and the nascent filament alternately passes through each guide roller in sequence. The inner filament of the filament bundle close to the roller surface of a guide roller becomes the outer filament away from the roller surface at the adjacent guide roller.

[0007] The spinning water tank is further designed in that there are three guide rollers, and the nascent filaments alternately pass through each guide roller in an "S" shape.

[0008] The spinning water tank is further designed such that the three guide rollers have the same diameter and the same height.

[0009] The spinning water tank is further designed such that, among the three guide rollers, the diameter of the middle guide roller is larger than that of the two guide rollers on both sides, and the axis of the middle guide roller is higher than that of the two guide rollers on both sides.

[0010] The spinning water tank is further designed in that there are two guide rollers, and the nascent filaments alternately pass through the two guide rollers.

[0011] A further design of the spinning water tank is that the two ends of the guide roller are connected to the frame of the water tank via precision deep groove ball bearings.

[0012] A further design of the spinning water tank is that each guide roller is connected to a drive mechanism.

[0013] The beneficial effects of this utility model are as follows: This invention utilizes more than one guide roller to increase the contact points and area between the nascent filament and the roller surface, dispersing tension. Furthermore, the multiple guide rollers alter the direction of the nascent filament and the tension, significantly reducing slippage. Spinning production tests have shown improved guide roller stability. The inner filament close to the roller surface on one guide roller becomes the outer filament away from the roller surface on adjacent guide rollers, making the tension and stroke of the nascent filament bundle more consistent on both sides, further improving fineness stability. The dispersed force significantly reduces wear on individual rollers, keeping the guide roller surface smooth and reducing scratches on the nascent filament, thus improving the yarn quality pass rate. Simultaneously, the guide roller replacement cycle is extended by 40%, reducing production costs. The extended path of the nascent filament in the water tank increases the contact time with cooling water, resulting in faster and more uniform cooling, and significantly improved cooling and setting effects. This invention has a simple structure, achieved simply by increasing the number of guide rollers. It is highly compatible with existing spinning production lines, has low modification costs, and is easy to promote and apply in the spinning industry. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0015] Figure 2 This is a structural schematic diagram of another embodiment of the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1: As Figure 1 The diagram illustrates a spinning water tank used in the water bath step of nascent filament 3. It includes a water tank 1 containing cooling water. Three guide rollers 2 are sequentially arranged within the water tank 1 from the filament inlet to the filament outlet along the filament's travel direction. These guide rollers are distributed along the filament's travel direction, and the filament alternately passes through each guide roller. The inner filament closest to the surface of one guide roller becomes the outer filament furthest from the roller surface at the adjacent guide roller. The filament alternately passes through the guide rollers in an "S" shape. In this embodiment, the three guide rollers have the same diameter and height.

[0017] Since the function of the guide roller in this embodiment is limited to changing the path of the nascent filament so that it passes through the cooling water in the water tank; the guide roller can be made of common materials such as stainless steel and aluminum alloy, or lightweight materials such as ultra-high molecular weight polyethylene (UHMW-PE), or the surface can be conventionally treated as needed, which will not be elaborated here.

[0018] In this embodiment, since no drive mechanism is loaded onto the guide rollers, it is preferable to select guide rollers made of lightweight materials. With other process equipment and parameters remaining unchanged, after water bath treatment using the three guide rollers of this embodiment, the fiber fineness stabilizes at less than 2% within 15 days; after simple cleaning of the white oil on the guide roller surface (sponge wiping), the fineness can be maintained continuously.

[0019] To reduce the static friction required for the guide roller to rotate, both ends of the guide roller can be connected to the frame of the water tank via precision deep groove ball bearings.

[0020] As a variation of Example 1: The driving mechanism includes a motor, a reduction gear, and a transmission mechanism connected to the rotating shaft of each guide roller. Under the drive of the driving mechanism, the linear velocity of the roller surface of each guide roller is adapted to the traveling speed of the nascent filament. The active rotation of the guide rollers can further prevent relative slippage between the nascent filament and the guide roller surface, and the fineness stability can be further maintained.

[0021] The embodiment can also be modified as follows: like Figure 2 As shown, among the three guide rollers, the diameter of the middle guide roller is larger than that of the two side guide rollers, and the axis of the middle guide roller is higher than that of the two side guide rollers. In this case, a larger contact area is formed between the middle guide roller and the nascent filament bundle.

[0022] Of course, guide rollers can also be set to two or more than three, and the nascent filaments can alternately pass through the two guide rollers according to the overall specifications of the water tank.

Claims

1. A spinning water tank, characterized in that, More than one guide roller is rotatably arranged in the water tank. The guide rollers are distributed along the direction of the nascent filaments. The nascent filaments alternately pass through each guide roller in sequence. The inner filaments of the filament bundles that are close to the roller surface of a guide roller become the outer filaments that are away from the roller surface at the adjacent guide rollers.

2. The spinning water tank according to claim 1, characterized in that, There are three guide rollers, and the nascent filaments alternately pass through each guide roller, thus forming an "S" shape.

3. A spinning water tank according to claim 2, characterized in that, The three guide rollers have the same diameter and the same height.

4. A spinning water tank according to claim 2, characterized in that, Of the three guide rollers, the diameter of the middle guide roller is larger than that of the two guide rollers on either side, and the axis of the middle guide roller is higher than that of the two guide rollers on either side.

5. A spinning water tank according to claim 1, characterized in that, There are two guide rollers, and the nascent filaments alternately pass through the two guide rollers.

6. A spinning water tank according to claim 1, characterized in that, The two ends of the guide roller are connected to the frame of the water tank by precision deep groove ball bearings.

7. A spinning water tank according to any one of claims 1-6, characterized in that, Each guide roller is connected to a drive mechanism.

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