Wet spinning nascent fiber multi-stage segmented wet drafting equipment

Abstract

The invention relates to the technical field of wet spinning process production equipment, and discloses wet spinning nascent fiber multi-stage segmented wet drafting equipment which comprises a plurality of drafting baths which are arranged in an up-down stacked mode, nascent fiber bundles from a spinning machine, namely fiber tows to be drafted, are arranged in a wet drafting equipment body and are sequentially immersed in the multiple drafting baths; by means of the full-automatic drawing machine, the occupied area of equipment can be greatly reduced, the space layout of a production line is optimized, the cyclic inspection route is reduced, and the overall efficiency and the space utilization rate of the production line are effectively improved; by accurately adjusting the position of the filament pressing guide rod of each drafting bath and the immersion depth of the fiber filament bundle, the soaking and stretching wrap angle of the filament bundle in each drafting bath can be controlled, the stretching multiple of fibers can be effectively improved, the stability of the whole production process is guaranteed, and the phenomenon that the filament bundle is stretched unevenly in the drafting bath is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of wet spinning process production equipment, in particular to a multi-stage segmented wet drawing device for wet spinning primary fibers. Background Art

[0002] In the wet spinning process, the wet and hot drawing process of nascent fibers is one of the key processes that affect fiber performance. The nascent fibers must be wet and hot drawn to make the mechanical properties of the fibers meet the use requirements; and the greater the drawing multiple, the higher the fiber breaking strength. The process often adopts multi-stage segmented drawing to meet the maximum drawing multiple. Generally, the wet drawing bath is composed of inorganic salts, inorganic acid aqueous solutions and other components. Under high temperature conditions, the fiber bundles are wet plasticized, and the fiber is subjected to the speed difference of the front and rear guide rollers to make the macromolecules arranged axially. Through the multi-stage segmented drawing bath, the fiber bundles can be flexibly allocated to different drawing multiples in each bath; through the upper and lower adjustable wire pressing guide rods, the bundle wrap angle of the bundle entering and exiting the drawing bath can be flexibly and effectively adjusted, thereby affecting the operability, fiber stretching multiple, and stretching stability, and ultimately the fiber quality is effectively controlled. In the traditional wet spinning process, the drafting bath of the primary fiber multi-stage segmented wet drafting equipment is arranged in a "single" shape, and the length direction is about 3.5 times that of the upper and lower stacking arrangement. The wire pressing guide rod is not adjustable, which leads to a long operation line, inconvenience in drawing and pressing wires through high-temperature corrosive liquids, unadjustable wrap angle of the tow, and long patrol inspection lines. As a result, the fiber will be entangled with the roller due to untimely patrol inspections, and the subsequent process will be forced to stop production; scalding accidents are easily caused by drawing wires in high-temperature and corrosive baths; because the wrap angle of the guide rod cannot be adjusted, the tow is not in the bath or the wrap angle is small, which produces greater resistance and affects the drafting, resulting in drafting hair or broken ends, which greatly affects the continuity and quality stability of fiber production. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the existing equipment and device technology, and to propose a multi-stage segmented wet drawing device for wet-spinning primary fibers.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-stage segmented wet stretching device for wet-spinning nascent fibers, wherein the main body of the wet stretching device comprises a plurality of stretching baths arranged in an upper and lower stacking manner, wherein the main body of the wet stretching device comprises nascent fiber bundles from a spinning machine, i.e., fiber bundles to be stretched, and the fiber bundles are immersed in a plurality of stretching baths in sequence; both ends of the stretching baths are provided with wire-supporting guide rods and adjustable wire-pressing guide rods for ensuring that the fiber bundles are effectively immersed in the stretching baths, and two adjustable wire-pressing guide rods in the same stretching bath are located between the two wire-supporting guide rods; a side "P" guide roller is provided between two adjacent stretching baths for stretching and steering the fiber bundles between the two adjacent stretching baths; and both the fiber bundle inlet and outlet ends of the main body of the wet stretching device are provided with positive "P" guide rollers.

[0005] Preferably, the middle roller and the side rollers of the positive guide roller and the side guide roller are both provided with liquid squeezing rollers.

[0006] Preferably, the fiber bundle is arranged between the positive guide roller and the liquid pressing roller.

[0007] Preferably, the fiber bundle is arranged between the side guide roller and the liquid pressing roller.

[0008] Preferably, a return bath line is provided at the bottom of the drawing bath.

[0009] The beneficial effects of the present invention are: 1. Compact layout and improved production efficiency: The equipment adopts the design of superimposed drafting baths, which can greatly reduce the equipment footprint and optimize the spatial layout of the production line compared with the traditional linear arrangement, thereby effectively improving the overall efficiency and space utilization of the production line.

[0010] 2. Ensure the stability of the stretching process: By accurately adjusting the position of the wire pressing guide rod of each stretching bath and the immersion depth of the fiber tow, the immersion and stretching wrap angle of the tow in each stretching bath can be controlled, thereby effectively improving the stretching multiple of the fiber and ensuring the stability of the entire production process, avoiding uneven stretching of the tow in the stretching bath.

[0011] 3. Avoid fiber quality fluctuations: In the setting of the drafting guide rollers, a combination of positive guide rollers and side guide rollers is adopted. This not only ensures the effective drafting of the fiber tows between multiple drafting baths, but also prevents fiber quality fluctuations caused by insufficient guide roller pressure or inconsistent speed, thereby improving product stability and consistency.

[0012] 4. Reduce the labor intensity of operators: The adjustable wire pressing guide rod and the precisely controlled drafting guide roller configuration not only reduce the operator's operation frequency, but also reduce the work intensity through automatic adjustment and simple operation design, and reduce production stoppages or safety accidents caused by improper operation.

[0013] 5. Improve product quality and fiber stretching effect: The equipment achieves a higher stretching multiple and uniformity through a finely controlled stretching process, thereby improving the quality and performance of the final fiber and meeting the production requirements of high-quality fiber products.

[0014] 6. Effectively reduce the risk of operational accidents: Through reasonable equipment design, especially in the adjustability of the wire pressing guide rod and the clamping accuracy, the damage to the fiber during the stretching process or employee safety accidents such as burns caused by improper operation are significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a multi-stage segmented wet drafting device for wet-spinning nascent fibers proposed in an embodiment of the present invention; Figure 2 A schematic top view of the structure of a multi-stage segmented wet drafting device for wet-spinning nascent fibers according to an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a wire guide rod in a multi-stage wet drafting device for wet-spinning nascent fibers proposed in an embodiment of the present invention; Figure 4 It is a schematic structural diagram of an adjustable wire pressing guide rod in a multi-stage wet drawing device for wet-spinning nascent fibers proposed in an embodiment of the present invention.

[0016] In the figure: 1-fiber bundle, 2-positive guide roller, 3-side guide roller, 4-wire guide rod, 5-adjustable wire pressing guide rod, 6-drawing bath, 7-return bath pipeline, 8-liquid pressing roller, 9-wet drawing equipment body. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] In one embodiment, referring to Figures 1 to 4, a multi-stage segmented wet stretching device for wet-spinning nascent fibers, wherein the wet stretching device body 9 comprises a plurality of stretching baths 6 arranged in an upper and lower stacked manner, wherein the wet stretching device body 9 comprises a nascent fiber bundle from a spinning machine, i.e., a fiber bundle 1 to be stretched, and the fiber bundle 1 is immersed in a plurality of stretching baths 6 in sequence; both ends of the stretching bath 6 are provided with a wire guide rod 4 and an adjustable wire pressing guide rod 5, which are used to ensure that the fiber bundle 1 is effectively immersed in the stretching bath 6, and the two adjustable wire pressing guide rods 5 in the same stretching bath 6 are located between the two wire guide rods 4; two adjacent stretching baths 6 is provided with a side guide roller 3 for stretching and steering the fiber bundle 1 between two adjacent drawing baths 6, helping to control the stretching multiple of the fiber bundle 1, ensuring that the fiber bundle 1 is smoothly transferred between the drawing baths 6, and avoiding entanglement or deformation; the fiber bundle 1 inlet and outlet ends of the wet drawing equipment body 9 are both provided with a genuine guide roller 2, the genuine guide roller 2 enables the fiber bundle 1 to stably enter the wet drawing equipment body 9 and perform appropriate preliminary stretching, and the configuration of the genuine guide roller 2 and the side guide roller 3 helps to ensure the continuity of the production line and product quality.

[0019] As a preferred embodiment of the present invention, the middle roller and the side rollers of the positive guide roller 2 and the side guide roller 3 are both provided with a squeezing roller 8, and the squeezing effect of the squeezing roller 8 further ensures that the bath liquid is effectively discharged when the fiber bundle 1 passes through the positive guide roller 2 and the side guide roller 3, thereby reducing the fiber bundle 1 from bringing the front bath liquid into the rear bath, causing changes in the bath liquid composition, and facilitating subsequent processing.

[0020] As a preferred embodiment of the present invention, the fiber bundle 1 is arranged between the positive guide roller 2 and the liquid squeezing roller 8.

[0021] As a preferred embodiment of the present invention, the fiber bundle 1 is arranged between the side guide roller 3 and the liquid squeezing roller 8.

[0022] As a preferred embodiment of the present invention, a return bath pipeline 7 is provided at the bottom of the drawing bath 6 .

[0023] As a preferred embodiment of the present invention, the adjustable wire pressing guide rods 5 at both ends of each drawing bath 6 can be used to adjust the fiber bundle 1 to be fully immersed in the bath and to have a suitable wrap angle.

[0024] As a preferred embodiment of the present invention, by adjusting the rotation speed of the positive guide roller 2 and the side guide roller 3, the stretching multiples of the fiber bundle 1 in each stretching bath 6 can be reasonably distributed; by adjusting the upper and lower positions of the screw rods of the adjustable wire pressing guide rods 5 located at both ends of each stretching bath 6, the fiber bundle 1 can be completely immersed in the stretching bath 6, and the fiber bundle 1 can be laid flat in the center of the stretching bath 6 with an appropriate wrap angle.

[0025] As a preferred embodiment of the present invention, the stretching bath 6 is made of stainless steel, the length of the stretching bath 6 is 4000 mm to 6000 mm, the width of the stretching bath 6 is 500 mm to 800 mm, and the depth of the stretching bath 6 is 150 mm to 250 mm.

[0026] As a preferred embodiment of the present invention, each group of positive guide rollers 2 and each group of side guide rollers 3 are composed of three guide rollers, the guide rollers are made of stainless steel with polished surfaces, the guide roller diameter is 150 mm~300 mm, and the length is 400 mm~700 mm.

[0027] As a preferred embodiment of the present invention, the wire guide rod 4 and the adjustable wire pressing guide rod 5 are high-boron high-temperature resistant glass guide rods, and the diameter of the high-boron high-temperature resistant glass guide rod is 30 mm to 50 mm, and the length is 490 mm to 790 mm.

[0028] As a preferred embodiment of the present invention, the position of the adjustable wire pressing guide rod 5 is adjusted according to the immersion depth of the fiber bundle 1 and the wrap angle of the fiber bundle 1, so as to ensure the continuity and quality of the bundle stretching. When the immersion depth of the fiber bundle 1 meets the requirements, the wrap angle is controlled to be as large as possible, and the diameter of the adjustable wire pressing guide rod 5 is used to be as large as possible, so as to ensure uniform stretching of the fiber bundle 1 in several stretching baths 6.

[0029] As a preferred embodiment of the present invention, Figure 4 As shown, guide rod seats are provided at both ends of the adjustable wire pressing guide rod 5, and the thread specification of the adjustable screw on the adjustable wire pressing guide rod 5 is M16~M18.

[0030] The working principle of the wet spinning multi-stage segmented wet drawing equipment is: through a plurality of drawing baths 6 arranged in an upper and lower stack, using the different bath liquid components and temperatures of each drawing bath 6, and the speed difference between the positive guide roller 2 and the side guide roller 3, the nascent fiber bundle 1 in the wet spinning process is processed in sequence. The fiber bundle 1 enters the wet drawing equipment body 9 from the outlet end of the wet spinning coagulation bath, first passes through the positive guide roller 2 at the inlet end of the bundle, and enters the first drawing bath 6. A wire support guide rod 4 and an adjustable wire pressing guide rod 5 are respectively provided at both ends of each drawing bath 6 to ensure that the fiber bundle 1 is effectively immersed in the drawing bath 6. At the same time, the upper and lower positions of the wire pressing guide rod 5 are adjusted to control the immersion depth and wrap angle of the fiber bundle 1, so as to ensure that the fiber bundle 1 is plasticized in the wet and hot state in the drawing bath 6, which is conducive to high-multiple and uniform stretching. The fiber bundle 1 in each drawing bath 6 is transmitted through the upstream and downstream guide rollers and enters the adjacent drawing bath 6 in sequence. Side guide rollers 3 are arranged between adjacent drawing baths 6 to steer and draw the fiber bundles 1, ensuring that the fiber bundles 1 smoothly transition between the drawing baths 6 without entanglement or uneven stretching. During the drawing process, the speed difference between the side guide rollers 3 and the main guide rollers 2 determines the drawing multiple and drawing effect of the bundle. The squeeze rollers 8 configured on the middle rollers and side rollers of each group of guide rollers effectively remove the excess bath liquid of the previous drawing bath 6 and bring it into the next drawing bath 6, ensuring that the composition of the fiber bundles 1 in the bath liquid of each drawing bath 6 is stable. By accurately adjusting the guide roller speed in each drawing bath 6, the position of the wire pressing guide rod 4 and the configuration of the drawing bath 6, the equipment can achieve efficient and stable fiber drawing processing, and finally obtain high-quality and uniform fiber bundles 1 after wet heat stretching. Semi-finished fiber products smoothly enter the finishing process.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Multi-stage wet drawing equipment for wet spinning primary fibers, characterized in that: The wet drawing device body (9) comprises a plurality of drawing baths (6) arranged in an upper and lower stacked manner, wherein the wet drawing device body (9) contains a primary fiber bundle from a spinning machine, i.e., a fiber bundle (1) to be drawn, and the fiber bundle (1) is immersed in the plurality of drawing baths (6) in sequence; Both ends of the drafting bath (6) are provided with a wire guide rod (4) and an adjustable wire pressing guide rod (5) for ensuring that the fiber bundle (1) is effectively immersed in the drafting bath (6); the two adjustable wire pressing guide rods (5) in the same drafting bath (6) are located between the two wire guide rods (4); A side guide roller (3) in the shape of a triangle is arranged between two adjacent drafting baths (6) and is used to draft and deflect the fiber bundle (1) between the two adjacent drafting baths (6); Both the inlet and outlet ends of the fiber bundle (1) of the wet drafting equipment body (9) are provided with positive guide rollers (2).

2. The multi-stage segmented wet drawing equipment for wet-spinning primary fibers according to claim 1, characterized in that: The middle roller and the side rollers of the positive guide roller (2) and the side guide roller (3) are both provided with liquid squeezing rollers (8).

3. The multi-stage segmented wet drawing equipment for wet-spinning primary fibers according to claim 2, characterized in that: The fiber bundle (1) is arranged to penetrate between the genuine guide roller (2) and the liquid squeezing roller (8).

4. The multi-stage segmented wet drawing equipment for wet-spinning primary fibers according to claim 2, characterized in that: The fiber bundle (1) is arranged to penetrate between the side guide roller (3) and the liquid squeezing roller (8).

5. The multi-stage segmented wet drawing equipment for wet-spinning primary fibers according to claim 1, characterized in that: A return bath pipeline (7) is provided at the bottom of the drawing bath tank (6).

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