A fiber drawing mechanism and preparation equipment with dynamic extrusion and impregnation synergy

Abstract

This invention relates to a fiber drawing mechanism and preparation equipment with dynamic extrusion and impregnation synergy, belonging to the field of aramid fiber preparation technology, and solves the problem of structural damage caused by roller extrusion of aramid fibers in existing technologies. The preparation equipment of this invention includes: a first conveying device, a sizing tank, a second conveying device, and a fiber drawing mechanism; the fiber drawing mechanism consists of two sets of first drawing rollers and second drawing rollers arranged in a "W" shape with the guide rollers, the drawing roller assembly serving as a guiding structure for the fiber bundle; the first conveying device is used to convey aramid fibers to the fiber drawing mechanism, and the second conveying device is used to wind and guide the aramid fibers from the fiber drawing mechanism. This invention achieves dynamic coordination of fiber impregnation and stretching in the aramid fiber preparation process, ensuring the flexibility and efficiency of the process.

Description

Technical Field

[0001] This invention relates to the field of aramid fiber preparation technology, and in particular to a fiber drawing mechanism and preparation equipment with dynamic extrusion and impregnation synergistic effect. Background Technology

[0002] Aramid fiber, as a high-performance synthetic fiber, possesses excellent properties such as lightweight, high strength, and high temperature resistance, and is widely used in aerospace, defense, and composite materials industries. However, the smooth surface and strong chemical inertness of aramid fiber result in poor interfacial bonding with the resin matrix, directly affecting the mechanical properties and service life of composite materials. Therefore, sizing is a key technical step in improving the interfacial bonding between aramid fiber and the resin matrix.

[0003] Current sizing methods involve immersing aramid fibers in sizing solution, but these are all continuous, high-speed operations. The aramid fibers move rapidly within the sizing solution, resulting in insufficient residence time and inadequate sizing penetration. This leads to a thick but weak sizing film forming on the fiber surface, making it prone to desizing during subsequent processes and reducing sizing quality. Furthermore, after sizing, excess sizing solution needs to be removed before drying. Current methods often involve pressing the aramid fibers with pressure rollers. However, excessive pressure between these rollers causes over-compression, resulting in insufficient sizing solution content within the fibers and potential mechanical damage, further reducing the overall quality of the aramid fiber.

[0004] Therefore, in order to address the problem that the sizing effect of aramid fibers affects product quality, this invention provides a fiber drawing mechanism and preparation equipment with dynamic extrusion and impregnation synergistic effect. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a fiber drawing mechanism and preparation equipment with dynamic extrusion and impregnation synergy, in order to solve the problem that the sizing process in the existing para-aramid preparation process easily damages the fiber and reduces product quality.

[0006] The objective of this invention is mainly achieved through the following technical solutions:

[0007] A fiber pulling mechanism with dynamic compression and impregnation synergy includes: a fixed frame, a fixed bracket, a first movable bracket, and a second movable bracket. The fixed bracket is fixedly installed in the middle of the fixed frame. Two sets of the first and second movable brackets are symmetrically arranged on both sides of the fixed frame. Guide rollers, first pulling rollers, and second pulling rollers are respectively installed on the fixed frame, the first movable bracket, and the second movable bracket. The height of the first pulling roller is higher than the height of the second pulling roller, and the two first pulling rollers, the two second pulling rollers, and the guide rollers form a "W"-shaped pulling roller assembly, which serves as a guiding structure for the fiber bundle. The first and second movable brackets are slidably installed in sliding grooves on the fixed frame, and when the first and second movable brackets slide relative to the fixed frame, the pulling roller assembly can drive the fiber bundle to contract or expand. A lifting mechanism is provided below the fixed frame, which drives the fixed frame to rise and fall, and the pulling roller assembly can be synchronously raised or lowered under the drive of the fixed frame.

[0008] The fixing frame includes an inner fixing frame and an outer fixing frame; the inner fixing frame and the outer fixing frame are nested from the inside to the outside, the inner fixing frame has a first sliding groove on both sides, and the outer fixing frame has a second sliding groove on both sides; the first sliding groove is a horizontal groove, and the second sliding groove has a horizontal section and an inclined section, and the inclined section is higher than the horizontal section; the horizontal section of the second sliding groove is horizontally aligned with the first sliding groove.

[0009] Telescopic rod assemblies are installed on both sides of the first movable frame, and a first roller is provided at the end of the telescopic rod assembly; when the telescopic rod assembly is shortened, the first roller rolls along the first sliding groove; when the telescopic rod assembly is extended, the first roller rolls along the second sliding groove; fixed rods are provided on both sides of the second movable frame, and a second roller is rotatably installed on the fixed rod, and the second roller is located in the first sliding groove.

[0010] Furthermore, the fixed frame, the first movable frame, and the second movable frame are all inverted "U"-shaped structures.

[0011] Furthermore, when the first roller rolls in the first sliding groove, the first movable frame drives the first traction roller to move horizontally; when it rolls from the horizontal section of the second sliding groove to the inclined section, the first movable frame moves upward at an angle, and the first traction roller moves upward at an angle synchronously with the first movable frame.

[0012] Furthermore, as the second roller rolls along the first sliding groove, the second movable frame moves horizontally along the extension direction of the first sliding groove.

[0013] Furthermore, the fixed frame is provided with a first displacement driving component and a second displacement driving component; the upper part of the first movable frame is floatingly connected to the first protrusion; the upper part of the second movable frame is fixedly connected to the second protrusion; the first protrusion can be horizontally displaced under the drive of the first displacement driving component; the second protrusion can be horizontally displaced under the drive of the second displacement driving component.

[0014] Furthermore, the telescopic rod assembly includes: a fixed post, a movable shaft, a piston plate, and a spring.

[0015] Furthermore, the fixed column is welded and fixed to the first movable frame. A cavity is opened inside the fixed column, and a piston plate is installed in the cavity. A movable shaft is welded and fixed to one side of the piston plate, and the other side of the piston plate is welded and connected to the inner wall of the cavity through a spring spring.

[0016] Furthermore, the end of the movable shaft extends out from the fixed column and is connected to the first roller through a bearing. The extension and retraction of the telescopic rod assembly can be achieved by compressing the elastic spring through the movable shaft, thereby enabling the first roller to switch between the first sliding groove and the second sliding groove.

[0017] Furthermore, the movable shaft can be displaced by magnetic force, electric actuator, pneumatic pressure, or hydraulic pressure.

[0018] A fiber preparation device with dynamic extrusion and impregnation synergy includes: a first conveying device, a sizing tank, a second conveying device, and the fiber drawing mechanism; the first conveying device is used to convey aramid fibers to the fiber drawing mechanism, and the second conveying device is used to wind and export the aramid fibers from the fiber drawing mechanism.

[0019] The technical solution of this invention can achieve at least one of the following effects:

[0020] 1. Synergistic optimization of dynamic extrusion and wetting:

[0021] The fiber preparation equipment of the present invention, which combines dynamic extrusion and impregnation, forms a dynamic wrapping of aramid fibers in the slurry through the lateral reciprocating motion of the traction mechanism. During the dynamic deformation process of the "W"-shaped traction roller combination of the traction mechanism, the fibers undergo synchronous extrusion and stretching, which can promote the slurry to penetrate into the fiber interior and prolong the fiber impregnation time in the slurry, thereby achieving a fully uniform sizing effect. The present invention significantly improves the penetration uniformity of the slurry and solves the problem of poor slurry uniformity on the fiber surface caused by insufficient impregnation in traditional high-speed sizing.

[0022] 2. Adaptive adjustment and precise desizing:

[0023] The fiber preparation equipment of the present invention, which combines dynamic extrusion and impregnation, has a first sliding groove and a second sliding groove respectively provided on the inner and outer fixed frames of the fixed frame. The automatic switching between sizing and desizing modes is achieved by the sliding displacement of the first and / or second movable frames along the first and / or second sliding grooves. During sizing, the horizontal reciprocating motion enhances slurry penetration. The dynamic coordination of the two modes ensures the flexibility and efficiency of the process, and prevents slurry film from clumping on the fiber surface, thus improving the product quality of the finished fiber.

[0024] 3. Integrated double-threaded screw drive and slurry recovery:

[0025] The fiber preparation equipment of the present invention, which utilizes dynamic extrusion and impregnation in synergy, synchronously controls the movement of the first and second movable frames through a first displacement drive component and a second displacement drive component. This, in turn, controls the reciprocating motion of the traction rollers, precisely adjusting the extrusion and stretching forces to meet the production needs of different types of fiber products. The extruded slurry is directly returned to the sizing tank, forming a closed-loop slurry circulation. Through the synergistic design of mechanical transmission and resource recycling, the present invention ensures process stability and achieves green production.

[0026] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0027] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0028] Figure 1 This is a schematic diagram of the structural composition of the fiber preparation equipment with dynamic extrusion and impregnation synergy in Embodiment 3 of the present invention;

[0029] Figure 2 This is a schematic diagram of the structural composition of the fiber pulling mechanism in Embodiment 1 of the present invention;

[0030] Figure 3 for Figure 2 Exploded view of the inner fixed frame, outer fixed frame, fixed frame, first movable frame and second movable frame of the fiber pulling mechanism in the figure;

[0031] Figure 4 for Figure 2 Exploded view of the inner and outer fixing frames of the fiber traction mechanism in the image;

[0032] Figure 5 for Figure 2 A schematic diagram of the installation state of the first movable frame and the first protrusion of the fiber pulling mechanism in the middle;

[0033] Figure 6 for Figure 2 A schematic diagram showing the installation state of the first roller of the fiber pulling mechanism on the first movable frame;

[0034] Figure 7 This is a schematic diagram of the driving state of the displacement driving component on the movable frame in Embodiment 2 of the present invention;

[0035] Figure 8 This is a schematic diagram showing the distribution of the guide roller, the first traction roller, and the second traction roller of the present invention.

[0036] Figure 9 This is a schematic diagram of the fiber pulling state of the traction roller combination after the first and second traction rollers of the present invention have moved laterally;

[0037] Figure 10 This is a schematic diagram of the fiber pulling state of the traction roller assembly after the first traction roller moves obliquely upward according to the present invention.

[0038] Figure label:

[0039] 1-First conveying device; 2-Sizing tank; 3-Second conveying device; 4-Inner fixed frame; 5-Outer fixed frame; 6-Fixed frame; 7-First movable frame; 8-Second movable frame; 9-Guide roller; 10-First traction roller; 11-Second traction roller; 12-First protrusion; 13-Second protrusion; 14-First lead screw; 15-Second lead screw; 16-Vertical plate; 17-Support base; 18-First sliding groove; 19-Second sliding groove; 20-Baffle; 21-Fixed column; 22-Modible shaft; 23-Cavity; 24-Piston plate; 25-Elastic spring; 26-First roller; 27-Magnet block; 28-Side plate; 29-Telescopic pull rod; 30-Fixing ear; 31-Hydraulic cylinder; 32-Third protrusion; 33-Guide post; 34-Slot; 35-Slide rod; 36-First displacement drive device; 37-Second displacement drive device; 38-First displacement crossbar; 39-Second displacement crossbar; 40-First diagonal pull rod; 41-Second diagonal pull rod. Detailed Implementation

[0040] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0041] Example 1

[0042] A specific embodiment of the present invention discloses a fiber drawing mechanism with dynamic compression and impregnation synergistic effect, such as... Figure 2 As shown, it includes: a fixed frame, a fixed bracket 6, a first movable bracket 7 and a second movable bracket 8. The fixed bracket 6 is fixedly installed in the middle of the fixed frame; the first movable bracket 7 and the second movable bracket 8 are symmetrically arranged on both sides of the fixed bracket 6.

[0043] Specifically, such as Figure 2 , Figure 3 As shown, guide rollers 9, first traction rollers 10, and second traction rollers 11 are respectively installed on the fixed frame 6, the first movable frame 7, and the second movable frame 8. The first traction roller 10 and the second traction roller 11 are at different heights, and the two sets of first traction rollers 10 and second traction rollers 11, together with the guide rollers 9, form a "W"-shaped traction roller assembly, which serves as a guiding structure for the fiber bundle. The first movable frame 7 and the second movable frame 8 are slidably installed in the sliding grooves on the fixed frame, and when the first movable frame 7 and the second movable frame 8 slide relative to the fixed frame, the traction roller assembly can drive the fiber bundle to contract or expand. A lifting mechanism is provided below the fixed frame, which is used to drive the fixed frame to rise and fall, and the traction roller assembly can be synchronously raised or lowered under the drive of the fixed frame.

[0044] In one specific embodiment of the present invention, the lifting mechanism includes: a hydraulic cylinder 31; the hydraulic cylinder 31 is fixedly installed on both sides of the slurry tank 2 by means of a mounting seat, and a third protrusion 32 is welded and fixed to the piston rod end of the hydraulic cylinder 31, and the third protrusion 32 is integrally formed with the outer fixing frame 5.

[0045] Specifically, such as Figure 1 and Figure 2 As shown, the lifting mechanism also includes: fixed ears 30 and telescopic rods 29; a set of fixed ears 30 are welded to both sides of the slurry tank 2 and the outer fixed frame 5, and the fixed ears 30 on the slurry tank 2 and the outer fixed frame 5 are connected by telescopic rods 29; during the lifting and lowering of the outer fixed frame 5, the telescopic rods 29 extend and retract synchronously. In this embodiment, multiple sets of telescopic rods 29 and fixed ears 30 are used to achieve multi-point support for the outer fixed frame 5, maintaining its stability in vertical movement. In implementation, the hydraulic cylinder 31 pushes the outer fixed frame 5 upward through the third protrusion 32 to lift and lower it. The fixed ears 30 and telescopic rods 29 can assist in lifting and lowering, ensuring that no tilting occurs during the lifting and lowering process. The hydraulic cylinder 31 can move the pulling mechanism out of or into the slurry tank 2 by driving the outer fixed frame 5 to lift and lower.

[0046] In one specific embodiment of the present invention, such as Figure 3As shown, the fixing frame includes an inner fixing frame 4 and an outer fixing frame 5; the inner fixing frame 4 and the outer fixing frame 5 are nested from the inside out. Further, the inner fixing frame 4 has first sliding grooves 18 on both sides, and the outer fixing frame 5 has second sliding grooves 19 on both sides.

[0047] In one specific embodiment of the present invention, such as Figure 2 , Figure 3 As shown, the fixed frame 6, the first movable frame 7, and the second movable frame 8 are all disposed within the inner fixed frame 4. There are two of each of the first movable frame 7 and the second movable frame 8 symmetrically arranged about the fixed frame 6. Specifically, the two sides of the movable fixed frame 6 are welded and fixed to the inner frame of the inner fixed frame 4, while the two sides of the first movable frame 7 and the second movable frame 8 are attached to the inner frame of the inner fixed frame 4 but not fixed.

[0048] Specifically, such as Figure 2 , Figure 3 As shown, the fixed frame 6, the first movable frame 7, and the second movable frame 8 are all in an inverted "U" shape. The lower end of the fixed frame 6 is rotatably connected to the guide roller 9 via a bearing. The middle part of the first movable frame 7 is rotatably connected to the first traction roller 10 via a bearing. The lower end of the second movable frame 8 is rotatably connected to the second traction roller 11 via a bearing. The guide roller 9, the two first traction rollers 10, and the two second traction rollers 11 are distributed in a "W" shape.

[0049] Specifically, such as Figure 3 , Figure 4 As shown, the first sliding groove 18 is a horizontal groove. The second sliding groove 19 has a horizontal section and an inclined section, and the inclined section is higher than the horizontal section. The horizontal section of the second sliding groove 19 is horizontally aligned with the first sliding groove 18. That is, the horizontal section of the second sliding groove 19 overlaps with the first sliding groove 18 in the horizontal direction; the inclined section of the second sliding groove 19 extends upward at an incline relative to the first sliding groove 18.

[0050] Specifically, the length of the first sliding groove 18 is greater than the length of the second sliding groove 19; for example... Figure 3 , Figure 4 As shown.

[0051] When the fiber pulling mechanism of the present invention is implemented:

[0052] The fiber pulling mechanism is raised or lowered by the lifting mechanism, so that the fiber bundle can be immersed in the sizing solution or removed from the sizing tank 2.

[0053] When the fiber pulling mechanism is located inside the sizing tank 2, the inner fixing frame 4 and the outer fixing frame 5 rest together on the top surface of the sizing tank 2. At this time, the sizing tank 2 supports the entire pulling mechanism. Simultaneously, the guide roller 9, the first pulling roller 10, and the second pulling roller 11, located inside the sizing tank 2, can sizing the fibers. During sizing, both the first movable frame 7 and the second movable frame 8 slide in the first sliding groove 18. By realizing the reciprocating contraction and extension of the "W"-shaped pulling roller combination, a better impregnation and sizing effect is achieved.

[0054] When the fiber pulling mechanism is located above the sizing tank 2: the rolling displacement of the first pulling roller 10 and / or the second pulling roller 11 can squeeze out excess slurry from the fiber. During desizing, the first movable frame 7 slides along the inclined section of the second sliding groove 19, and the second pulling roller 11 rolls and squeezes the fiber, providing an oblique tensile force to uniformly squeeze out excess slurry, and avoiding fiber damage through dynamic continuous pulling.

[0055] In one specific implementation of this embodiment, such as Figure 2 and Figure 3 As shown, the inner fixing frame 4 and the outer fixing frame 5 are combined into a rectangular frame shape. The first sliding groove 18 penetrates the side wall of the inner fixing frame 4, and the second sliding groove 19 penetrates the side wall of the outer fixing frame 5, so that the second sliding groove 19 and the first sliding groove 18 are interconnected; the outer frame of the inner fixing frame 4 and the inner frame of the outer fixing frame 5 are attached and welded together. Furthermore, a baffle 20 is fixedly adhered to one side of the groove wall of the second sliding groove 19, and the baffle 20 is used to prevent external debris from entering the first sliding groove 18 and the second sliding groove 19.

[0056] In one specific embodiment of the present invention, such as Figure 6 As shown, telescopic rod assemblies are installed on the outer walls of both sides of the first movable frame 7, and a first roller 26 is provided at the end of the telescopic rod assembly; when the telescopic rod assembly is in the shortened state, the first roller 26 rolls along the first sliding groove 18; when the telescopic rod assembly is in the extended state, the first roller 26 rolls along the second sliding groove 19.

[0057] Specifically, an extension groove matching the inclined section of the second sliding groove 19 is provided at the upper end of the first sliding groove 18. The extension groove provides displacement space for the telescopic rod assembly when the first roller 26 rolls along the inclined section of the second sliding groove 19. Alternatively, the diameter of the first roller 26 is set to be larger than the diameter of the telescopic rod assembly, so that the telescopic rod assembly can be displaced within the first sliding groove 18 when the first roller 26 rolls along the inclined section of the second sliding groove 19.

[0058] In one specific embodiment of the present invention, fixed rods are welded to the outer walls of both sides of the second movable frame 8, and second rollers are provided on the fixed rods. The second rollers are disposed in the first sliding groove 18. When the second rollers roll along the first sliding groove 18, the second movable frame 8 is horizontally displaced along the extending direction of the first sliding groove 18. Specifically, fixed rods are welded to the outer walls of both sides of the second movable frame 8, and second rollers are rotatably mounted on the fixed rods via bearings. The second rollers on the fixed rods are located in the first sliding groove 18.

[0059] In one specific embodiment of the present invention, such as Figure 1 , Figure 2 As shown, the fixed frame is provided with a first displacement driving component and a second displacement driving component; the upper part of the first movable frame 7 is floatingly connected to the first protrusion 12 of the first displacement driving component. When the first protrusion 12 moves linearly, the first movable frame 7 can slide along the inclined section of the second sliding groove 19; the upper part of the second movable frame 8 is fixedly connected to the second protrusion 13 of the second displacement driving component. When the second protrusion 13 moves linearly, the second movable frame 8 can move linearly along the first sliding groove 18; the first protrusion 12 can move horizontally under the drive of the first displacement driving component; the second protrusion 13 can move horizontally under the drive of the second displacement driving component.

[0060] In one specific embodiment of the present invention, the floating connection between the first movable frame 7 and the first protrusion 12 is as follows: Figure 5 As shown, a set of guide posts 33 are vertically fixed on the top surface of the first movable frame 7, and the top ends of the guide posts 33 are slidably inserted into slots 34 opened inside the first protrusion 12. The protruding part extending vertically upward on the top surface of the second movable frame 8 serves as the second protrusion 13.

[0061] Furthermore, a positioning spring is welded between the guide post 33 and the bottom of the slot 34, and the positioning spring pushes the first movable frame 7 to roll against the bottom surface of the first sliding groove 18 or the second sliding groove 19. When the first roller 26 moves upward along the inclined section of the second sliding groove 19, the positioning spring is compressed by the guide post 33, causing the overall height of the first movable frame 7 and the first traction roller 10 to rise.

[0062] Furthermore, the first displacement driving assembly includes: a first protrusion 12, a first lead screw 14, and a first motor; the second displacement driving assembly includes: a second protrusion 13, a second lead screw 15, and a second motor. For example... Figure 1 , Figure 2As shown, the first motor and the second motor are fixed on the support base 17, the support base 17 is fixed on the inner fixed frame 4, and the fixed frame is fixedly connected to the vertical plate 16. One end of the first lead screw 14 and the second lead screw 15 are connected to the vertical plate 16 through bearings, so that the first lead screw 14 and the second lead screw 15 can rotate relative to the fixed frame.

[0063] like Figure 2 As shown, one end of the first lead screw 14 is fixedly connected to the output shaft of the first motor, and the other end slides through the second protrusion 13 and is simultaneously threaded with the first protrusion 12. When the first lead screw 14 rotates, it can drive the first protrusion 12 to move. One end of the second lead screw 15 is fixedly connected to the output shaft of the second motor, and the other end is threaded with the second protrusion 13 and simultaneously slides through the first protrusion 12.

[0064] Specifically, such as Figure 5 As shown, the first protrusion 12 has a first slot for the second lead screw 15 to pass through, and the second lead screw 15 can slide in the first slot; the second protrusion 13 has a second slot for the first lead screw 14 to pass through, and the first lead screw 14 can slide in the second slot. In this embodiment, the sliding engagement of the first lead screw 14 and the second lead screw 15 with the second protrusion 13 and the first protrusion 12 can realize the rotational limitation of the first protrusion 12 and the second protrusion 13, thereby realizing the two protrusions and the lead screw forming a lead screw pair, so that the first protrusion 12 and the second protrusion 13 can achieve linear displacement under the rotational drive of the first lead screw 14 and the second lead screw 15.

[0065] Specifically, both the first lead screw 14 and the second lead screw 15 have symmetrical double-threaded structures. The threads of the two first protrusions 12 engaging with the first lead screw 14 have opposite directions of rotation, and the threads of the two second protrusions 13 engaging with the second lead screw 15 have opposite directions of rotation. In this embodiment, by setting the thread engagement directions of the first protrusions 12 and 13 with the first lead screw 14 and 15, it is achieved that when the first lead screw 14 / second lead screw 15 rotates, it can synchronously drive the two first protrusions 12 / 2nd protrusions 13 to move towards each other or away from each other.

[0066] In one specific embodiment of the present invention, such as Figure 6As shown, the telescopic rod assembly includes: a fixed post 21, a movable shaft 22, a piston plate 24, and a spring 25. Specifically, fixed posts 21 are welded and fixed to both sides of the first movable frame 7. A cavity 23 is formed inside the fixed post 21, and a piston plate 24 is disposed within the cavity 23. The movable shaft 22 is welded and fixed to one side of the piston plate 24, and the other side of the piston plate 24 is welded and connected to the inner wall of the cavity 23 via a spring 25. The end of the movable shaft 22 extends from the fixed post 21 and is fitted with a first roller 26 connected to its bearing. The telescopic rod assembly can be extended or retracted by compressing the spring 25 through the movable shaft 22, thereby enabling the first roller 26 to switch between the first sliding groove 18 and the second sliding groove 19.

[0067] Furthermore, in order to realize the telescopic movement of the telescopic rod assembly, the telescopic rod assembly also includes a telescopic drive structure.

[0068] In this embodiment, the telescopic drive structure includes: a magnet block 27 and a magnet strip; the magnet block 27 is embedded at the end of the movable shaft 22, and a set of side plates 28 are welded to each of the two side walls of the slurry pool 2. The side plates 28 can fit against the outer side wall of the outer fixed frame 5. A long strip of magnet is embedded in the side of the side plate 28 facing the outer fixed frame 5, and the side of the magnet strip opposite to the magnet block 27 has the same magnetic pole. Specifically, the magnetic force of the magnet strip and the magnet block 27 is greater than the elastic force of the spring 25, and the maximum compression of the spring 25 is equal to the width of the second sliding groove 19. When the magnet strip is aligned with the magnet block 27, the first roller 26 on the movable shaft 22 compresses the spring 25 under the action of magnetic force and pushes it into the first sliding groove 18; when the magnet strip is far away from the magnet block 27, the first roller 26 is located in the horizontal section of the second sliding groove 19 under the action of the elastic force of the spring 25.

[0069] Furthermore, the magnet strip is designed as a long strip, so that when the first roller 26 rolls linearly in the first sliding groove 18, the magnet block 27 can always be opposite to the magnet strip and generate a repulsive force effect.

[0070] During the sizing operation, the inner fixed frame 4 and the outer fixed frame 5 rest on the top surface of the sizing tank 2. At this time, the magnetic strip on the side plate 28 is opposite to the magnetic block 27. The baffle 20 is made of plastic and does not block magnetism. The magnetic strip and the magnetic block 27, being of the same polarity, repel each other. Under the action of repulsion, the magnetic block 27 will move away from the magnetic strip. The magnetic block 27 will drive the movable shaft 22 to move. The movable shaft 22 will push the piston plate 24 to move in the cavity 23 and compress the elastic spring 25. The length of the telescopic rod assembly is shortened. When the elastic spring 25 is compressed to its maximum, the movable shaft 24 moves. When the moving shaft 22 stops moving, the first roller 26 moves from the horizontal section of the second sliding groove 19 to the first sliding groove 18, and the first roller 26 can roll linearly in the first sliding groove 18; the second roller on the second movable frame 8 can roll linearly directly in the first sliding groove 18. Thus, under the coordinated action of the first roller 26, the second roller and the first sliding groove 18, the first movable frame 7 and the second movable frame 8 can move linearly. In this way, driven by the first lead screw 14 and the second lead screw 15, the two can move linearly back and forth.

[0071] In this embodiment, the magnet strip can also be replaced by an electromagnet.

[0072] In this embodiment, a spring spring 25, a magnetic strip, and a magnetic block 27 are used to drive the telescopic rod assembly to extend and retract; or the movable shaft 22 is driven to move by an electric push rod built into the cavity 23; alternatively, an electric telescopic rod can be used to replace the telescopic rod assembly, or hydraulic or pneumatic pressure can be introduced into the cavity 23 as a driving force to drive the movable shaft 22 to move and achieve the extension and retraction of the telescopic rod assembly, or an electric, pneumatic, or hydraulically driven top block can be installed on the outside of the outer fixed frame 5, and the top block pushes the first roller 26 to move to achieve position switching, while simultaneously compressing the telescopic rod assembly; all of the above belong to the same technical concept as this invention and fall within the protection scope of this invention.

[0073] In this embodiment, the working principle of the fiber pulling mechanism is as follows:

[0074] like Figure 2 , Figure 8 , Figure 9 and Figure 10 As shown, in order to help improve the sizing effect, when the fiber pulling mechanism drives the fiber bundle to be immersed in the sizing liquid, the first pulling roller 10 and the first pulling roller 10 need to move continuously back and forth.

[0075] The specific movement operations of the first traction roller 10 are as follows:

[0076] After the first motor is powered on, it drives the first lead screw 14, which is connected to it, to rotate clockwise on the vertical plate 16. Due to the setting of the second slot, the rotation of the first lead screw 14 does not act on the second protrusion 13. The first lead screw 14 drives the two first protrusions 12, which are screwed to it, to move closer to each other. The two first protrusions 12 drive the two first movable frames 7 to move synchronously and move closer to each other through the guide post 33. When the two first movable frames 7 move, they can drive the two first traction rollers 10 to move horizontally towards each other (closer to each other). When the first motor drives the first lead screw 14, which is connected to it, to rotate counterclockwise, the two first traction rollers 10 move in opposite directions (away from each other). By driving the first lead screw 14 to rotate alternately clockwise and counterclockwise, the first movable frame 7 drives the first traction roller 10 to move horizontally back and forth.

[0077] After the second motor is powered on, it drives the second lead screw 15, which is connected to it, to rotate clockwise on the vertical plate 16. Due to the setting of the first slot, the rotation of the second lead screw 15 does not act on the first protrusion 12. The second lead screw 15 drives the two second protrusions 13 to move closer to each other. The two second movable frames 8 move synchronously with the second protrusions 13 and move closer to each other. When the second movable frames 8 move, they can drive the second traction rollers 11 to move horizontally towards each other (closer to each other). When the second motor drives the second lead screw 15 to rotate counterclockwise, the movement of the two second movable frames 8 can drive the second traction rollers 11 to move horizontally in the opposite direction (away from each other). When the second motor drives the second lead screw 15 to rotate alternately clockwise and counterclockwise, the second movable frames 8 can drive the second traction rollers 11 to move horizontally back and forth.

[0078] like Figure 8 , Figure 9 As shown, when the first traction roller 10 and the second traction roller 11 move horizontally back and forth, they will continuously pull the aramid fiber. When the two first traction rollers 10 and the two second traction rollers 11 come close to each other, the two first traction rollers 10 will drive the aramid fiber to gradually wrap around the guide roller 9. During the wrapping process, the slurry between the aramid fiber and the guide roller 9 will be squeezed. Under the squeezing action, some of the slurry will be forced to penetrate the aramid fiber, and it will penetrate from the top surface of the aramid fiber to the bottom surface.

[0079] like Figure 9 As shown, the two second traction rollers 11, together with the guide roller 9, cause the aramid fibers to gradually wrap around the first traction roller 10. During the wrapping process, the slurry between the aramid fibers and the first traction roller 10 is squeezed. Under the squeezing action, some of the slurry is forced to penetrate the aramid fibers, and it penetrates from the bottom surface of the aramid fibers to the top surface. The external force forces the slurry to flow in the fiber, so that the slurry can more fully and quickly wet the aramid fibers, thereby improving the sizing effect and preventing phenomena such as desizing in subsequent processes.

[0080] When the slurry application is complete, excess slurry needs to be removed:

[0081] The fixed frame and traction roller assembly are removed from the slurry tank 2 by the lifting mechanism, so that the magnetic strip on the side plate 28 is separated from the magnetic block 27 on the first movable frame 7. The elastic spring 25 returns to its natural length and drives the piston plate 24 to move and reset in the cavity 23. The movable shaft 22 moves and resets synchronously with the piston plate 24. The movable shaft 22 drives the first roller 26 to move again to the horizontal section of the second sliding groove 19. When the first lead screw 14 drives the two first protrusions 12 on it to move closer to each other, the first protrusions 12 drive the first movable frame 7 to move synchronously through the guide post 33. When the first roller 26 on the movable shaft 22 rolls from the horizontal section of the second sliding groove 19 to the inclined section, the first movable frame 7 will tilt and move upward. The height of the first movable frame 7 will be raised. In this way, when the guide post 33 on the first movable frame 7 moves horizontally with the first protrusions 12, it will move upward in the slot 34, thereby ensuring that the first movable frame 7 can tilt and reciprocate. The first traction roller 10 will tilt and move upward synchronously with the first movable frame 7.

[0082] like Figure 10 As shown, when the two first traction rollers 10 move upward synchronously with the first movable frame 7: the two first traction rollers 10, together with the guide roller 9 and the second traction roller 11, can stretch the aramid fiber. During the process, the second traction roller 11 can remain stationary or move horizontally back and forth. During the stretching process, the aramid fiber is closely attached to the first traction roller 10, the guide roller 9 and the second traction roller 11. In this way, the excess slurry in the aramid fiber will be squeezed out, and the squeezed slurry will drip directly into the sizing tank 2. During the slurry extrusion process, the pulling force of the traction roller on the fiber bundle is continuously and gradually applied, which can avoid fiber damage and also avoid adhesion between aramid fibers, which is beneficial to improving the drying effect of the subsequent drying process.

[0083] Example 2

[0084] One specific embodiment of the present invention provides an alternative to the displacement driving component in Embodiment 1:

[0085] In this embodiment, a trapezoidal mechanism consisting of a slide bar 35, a displacement driving device, a displacement crossbar, and a tie rod is used to replace the lead screw mechanism consisting of a lead screw and a motor in Embodiment 1.

[0086] like Figure 7 As shown, a slide bar 35 is fixedly installed inside the fixed frame, and the two ends of the slide bar 35 are fixedly connected to the front and rear ends of the fixed frame.

[0087] In this embodiment, the first protrusion 12 and the second protrusion 13 are both slidably mounted on the slide rod 35.

[0088] Specifically, such as Figure 7 As shown, the first displacement driving assembly includes: a first protrusion 12, a first displacement driving device 36, a first displacement crossbar 38, and a first diagonal tie rod 40; wherein, the two ends of the first displacement crossbar 38 are symmetrically connected to two first diagonal tie rods 40; one end of the first diagonal tie rod 40 is hinged to the first displacement crossbar 38, and the other end is hinged to the first protrusion 12, and the first displacement crossbar 38, the first diagonal tie rod 40, the first protrusion 12 and the slide rod 35 form a trapezoidal mechanism. When the first displacement driving device 36 drives the first displacement crossbar 38 to linear displacement, the two first diagonal tie rods 40 drive the two first protrusions 12 to move closer or further away from each other.

[0089] Similarly, the second displacement driving assembly includes: a second protrusion 13, a second displacement driving device 37, a second displacement crossbar 39, and a second diagonal tie rod 41; the two ends of the second displacement crossbar 39 are symmetrically connected to two second diagonal tie rods 41; one end of the second diagonal tie rod 41 is hinged to the second displacement crossbar 39, and the other end is hinged to the second protrusion 13, and the second displacement crossbar 39, the second diagonal tie rod 41, the second protrusion 13 and the slide rod 35 form a trapezoidal mechanism. When the second displacement driving device 37 drives the second displacement crossbar 39 to linear displacement, the two second diagonal tie rods 41 drive the two second protrusions 13 to move closer or further away from each other.

[0090] In this embodiment, the first displacement driving device 36 and the second displacement driving device 37 are components capable of outputting linear displacement, such as linear motors, cylinders, or hydraulic cylinders. Specifically, the first displacement driving device 36 and the second displacement driving device 37 are respectively disposed on both sides of the fixed frame, and the first displacement crossbar 38 and the second displacement crossbar 39 are arranged parallel to the slide bar 35, as shown below. Figure 7 As shown.

[0091] In this embodiment, by setting a first displacement driving component and a second displacement driving component, independent displacement driving of the two first protrusions 12 and the two second protrusions 13 is achieved. When the two first protrusions 12 move closer or further away from each other, they can drive the two first movable frames 7 and the first traction roller 10 to move closer or further away from each other; when the two second protrusions 13 move closer or further away from each other, they can drive the two second movable frames 8 and the second traction roller 11 to move closer or further away from each other.

[0092] like Figure 8 , Figure 9 , Figure 10As shown, the distribution design of the guide roller 9, the two first traction rollers 10, and the two second traction rollers 11 allows the aramid fibers to pass over the guide roller 9, the first traction rollers 10, and the second traction rollers 11 in a "W" shape when the first traction rollers 10 and the second traction rollers 11 move horizontally. This increases the time the aramid fibers spend moving in the sizing tank 2, allowing the sizing liquid to fully wet the aramid fibers. At the same time, as the two first traction rollers 10 and the two second traction rollers 11 move closer or further apart, the "W" shaped fibers and the traction roller combination can achieve overall contraction or extension, promoting the sizing liquid to penetrate into the fiber bundle. This achieves uniform sizing of the fiber bundle, ensuring a good sizing effect and the extrusion of excess sizing liquid, maintaining the consistency of sizing on the fiber surface without damaging the fiber bundle.

[0093] Example 3

[0094] One specific embodiment of the present invention provides a fiber preparation device with synergistic dynamic extrusion and impregnation, such as... Figure 1 As shown, it includes: a first conveying device 1, a sizing tank 2, a second conveying device 3, and the fiber pulling mechanism in embodiment 1 or embodiment 2; the first conveying device 1 is used to convey aramid fibers to the fiber pulling mechanism, and the second conveying device 3 is used to wind and export aramid fibers from the fiber pulling mechanism.

[0095] Specifically, both the first conveying device 1 and the second conveying device 3 consist of conveying rollers and tensioners. The conveying rollers can take in and release aramid fibers, and the tensioners can control the tension of the aramid fibers.

[0096] During implementation, the prepared slurry needs to be poured into the sizing tank 2 beforehand, and the traction mechanism is located above the sizing tank 2 at this time, so that the aramid fibers can pass through the "W"-shaped arrangement of the traction rollers of the traction mechanism. After the preparation is completed, the fiber traction mechanism is driven to move down into the sizing tank 2 by the lifting mechanism. At this time, the slurry can immerse the aramid fibers to achieve sizing. During the sizing process, the displacement driving component drives the first traction roller 10 and the second traction roller 11 to move to achieve dynamic sizing. After the sizing is completed, the fiber bundle and the fiber traction mechanism are moved up as a whole by the lifting mechanism, and the first movable frame 7 is driven to slide along the second sliding groove 19 by the first displacement driving component. At the same time, the first traction roller 10 rolls and pulls the fiber to squeeze out the excess slurry in the fiber bundle.

[0097] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A dynamic extrusion and infiltration synergistic fiber pulling mechanism, characterized in that, The utility model relates to a kind of fiber tow contraction and expansion device, including: Fixed frame, fixed frame, first movable frame and second movable frame, the fixed frame is fixedly installed in the middle part of fixed frame;The first movable frame and second movable frame are symmetrically provided with two groups on the two sides of the fixed frame;The fixed frame, first movable frame and second movable frame are respectively installed with guide roller, first pull roller and second pull roller;First pull roller is higher than second pull roller, two first pull rollers, two second pull rollers and guide roller form the pull roller combination of "W" shape arrangement, when the first movable frame and second movable frame relative to the sliding displacement of the fixed frame, it can drive fiber tow to contract or expand;Lifting mechanism is arranged below the fixed frame, and the lifting mechanism is used to drive the fixed frame to lift; First displacement drive assembly and second displacement drive assembly are arranged on the fixed frame;The top of the first movable frame is floatingly connected with first lug;The top of the second movable frame is fixedly connected with second lug;The first lug can be horizontally displaced under the drive of first displacement drive assembly;Second lug can be horizontally displaced under the drive of second displacement drive assembly; The floating connection mode between first movable frame and first lug is that a group of guide columns are vertically fixed to the top surface of first movable frame, the top end of guide column is slidingly inserted into the insertion slot formed in the inside of first lug;Positioning spring is welded and connected between guide column and slot bottom, and first movable frame is pushed to the bottom surface of first sliding groove or second sliding groove and rolls by positioning spring;When first roller is displaced upward along the inclined section of second sliding groove, the positioning spring is compressed by guide column, so that the overall height of first movable frame and first pull roller is lifted; The protruding part vertically upwardly extended on the top surface of second movable frame serves as second lug; The fixed frame includes: inner fixed frame and outer fixed frame;The inner fixed frame and outer fixed frame are nested from inside to outside, first sliding groove is formed on both sides of the inner fixed frame, and second sliding groove is formed on both sides of the outer fixed frame;The first sliding groove is horizontal groove, and the second sliding groove has horizontal section and inclined section, and the inclined section is higher than the horizontal section;The horizontal section of second sliding groove is horizontally aligned with first sliding groove; Telescopic rod assembly is installed on both sides of the first movable frame, and first roller is arranged at the end of telescopic rod assembly;When telescopic rod assembly shortens, first roller rolls along first sliding groove;When telescopic rod assembly lengthens, first roller rolls along second sliding groove;Fixed rod is arranged on both sides of the second movable frame, second roller is rotatably installed on fixed rod, and second roller is located in first sliding groove; The first displacement driving assembly comprises a first protrusion, a first screw rod and a first motor; the second displacement driving assembly comprises a second protrusion, a second screw rod and a second motor; the first motor and the second motor are fixed on a support seat, the support seat is fixed on an inner fixed frame, a vertical plate is fixedly connected to the fixed frame, one end of the first screw rod and the second screw rod is connected to the vertical plate through a bearing, so that the first screw rod and the second screw rod can rotate relative to the fixed frame; one end of the first screw rod is fixedly connected to an output shaft of the first motor, the other end of the first screw rod penetrates through the second protrusion and is threadedly connected to the first protrusion, and the first screw rod can drive the first protrusion to displace when rotating; one end of the second screw rod is fixedly connected to an output shaft of the second motor, the other end of the second screw rod is threadedly connected to the second protrusion and penetrates through the first protrusion. Alternatively, a sliding rod is fixedly arranged in the fixed frame, and two ends of the sliding rod are fixedly connected to front and rear ends of the fixed frame; the first protrusion and the second protrusion are slidably arranged on the sliding rod; the first displacement driving assembly comprises the first protrusion, a first displacement driving device, a first displacement cross rod and a first inclined pull rod; two ends of the first displacement cross rod are symmetrically connected to two first inclined pull rods; one end of the first inclined pull rod is hingedly connected to the first displacement cross rod, and the other end of the first inclined pull rod is hingedly connected to the first protrusion; a trapezoidal mechanism is formed between the first displacement cross rod, the first inclined pull rod, the first protrusion and the sliding rod; when the first displacement driving device drives the first displacement cross rod to linearly displace, the two first inclined pull rods drive the two first protrusions to move close to or away from each other; similarly, the second displacement driving assembly comprises the second protrusion, a second displacement driving device, a second displacement cross rod and a second inclined pull rod; two ends of the second displacement cross rod are symmetrically connected to two second inclined pull rods; one end of the second inclined pull rod is hingedly connected to the second displacement cross rod, and the other end of the second inclined pull rod is hingedly connected to the second protrusion; a trapezoidal mechanism is formed between the second displacement cross rod, the second inclined pull rod, the second protrusion and the sliding rod; when the second displacement driving device drives the second displacement cross rod to linearly displace, the two second inclined pull rods drive the two second protrusions to move close to or away from each other.

2. The dynamic squeeze and wick synergistic fiber pulling mechanism of claim 1, wherein, The fixed frame, the first movable frame and the second movable frame are all inverted "U" shaped structures.

3. The dynamic squeeze and soak synergized fiber pull mechanism of claim 1 or 2, wherein, When the first roller rolls in the first sliding groove, the first movable frame drives the first pulling roller to horizontally displace; when the first roller rolls from the horizontal section to the inclined section of the second sliding groove, the first movable frame is inclined to move upward, and the first pulling roller is synchronously inclined to move upward along with the first movable frame.

4. The dynamic squeeze and wick synergistic fiber pulling mechanism of claim 3, wherein, When the second roller rolls along the first sliding groove, the second movable frame horizontally displaces along the extension direction of the first sliding groove.

5. The dynamic squeeze and wick synergistic fiber pulling mechanism of claim 4, wherein, The telescopic rod assembly comprises a fixed column, a movable shaft rod, a piston plate and an elastic spring.

6. The dynamic squeeze and wick synergistic fiber pulling mechanism of claim 5, wherein, The fixed column is fixedly welded to the first movable frame, a cavity is formed in the fixed column, the piston plate is arranged in the cavity, the movable shaft rod is fixedly welded to one side of the piston plate, and the other side of the piston plate is fixedly connected to the inner wall of the cavity through the elastic spring.

7. The dynamic squeeze and wick synergistic fiber pulling mechanism of claim 6, wherein, The end of the movable shaft rod penetrates out of the fixed column and is connected to the first roller through a bearing, the telescopic rod assembly can be telescoped by compressing the elastic spring through the movable shaft rod, and the first roller can be switched in the first sliding groove and the second sliding groove.

8. The dynamic squeeze and wick synergistic fiber pulling mechanism of claim 7, wherein, The movable shaft rod can be driven to displace by magnetic force, an electric push rod, air pressure or hydraulic pressure.

9. A dynamic extrusion and infiltration synergistic fiber production apparatus, characterized by, comprising: a first conveying device for conveying aramid fibers to the fiber drawing mechanism, a sizing bath, a second conveying device for winding aramid fibers out of the fiber drawing mechanism, and a fiber drawing mechanism according to any one of claims 1 to 8.

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