Polylactic acid fiber spinning equipment

Abstract

The invention relates to the technical field of spinning processes, and discloses polylactic acid fiber spinning equipment which comprises an extrusion box, a cooling box is arranged on one side of the extrusion box, an oil coating box is arranged on the side, away from the extrusion box, of the cooling box, an oil storage chamber is fixedly installed on the upper portion of the interior of the oil coating box, and a feeding pipe fixedly communicates with the upper portion of the oil storage chamber. A stirring assembly for uniformly stirring an oil agent is arranged in the oil storage chamber, an oil coating assembly is arranged below the oil storage chamber, the oil coating assembly comprises an oleophylic sponge which can be extruded to deform, a circular inner groove is formed in the center of the inner wall of the oleophylic sponge, and when the oleophylic sponge is extruded, the oil agent uniformly permeates out from all directions of the inner groove; the oiling agent can wrap the fiber in all directions, the problem that local oiling is insufficient or excessive possibly occurring in a traditional oiling mode is solved, and it is guaranteed that each position of the surface of the fiber can be evenly coated with the oiling agent.

Description

Technical Field

[0001] This invention belongs to the field of spinning technology, specifically relating to a polylactic acid fiber spinning device. Background Technology

[0002] Polylactic acid (PLA) fiber is made from starchy agricultural products such as corn, wheat, and sugar beets. After fermentation to produce lactic acid, it is then polymerized and melt-spun. PLA fiber is a synthetic fiber whose raw materials are easy to grow and whose waste can be naturally degraded in nature. In soil or seawater, it can be decomposed into carbon dioxide and water by microorganisms. When burned, it does not emit toxic gases and does not cause pollution. It is a sustainable ecological fiber.

[0003] Polylactic acid (PLA) fiber spinning equipment is a key device specifically designed to process PLA raw materials into fibers. It typically consists of a feeding device, an extrusion device, and a discharge forming device. First, molten PLA raw materials are added to the extrusion cylinder, and then extruded and pushed to the die by a screw to form fibers. The fibers then enter the cooling device to cool and solidify rapidly, ultimately forming PLA fibers with stable performance that meet production standards. The qualified PLA fibers after cooling are then wound in an orderly manner by a winding device to form neat fiber rolls, preparing them for subsequent deep processing or direct application.

[0004] After polylactic acid fibers are cooled and formed, they need to be oiled, which means coating the fiber surface with an oiling agent. The oiling agent can form a protective film on the fiber surface, effectively preventing dust and other impurities from adhering and keeping the fiber clean. In addition, oiling can significantly reduce the friction and static electricity accumulation between fibers. In subsequent processing such as drawing and winding, this helps to prevent fuzzing and breakage caused by friction, greatly improving the processability of the fiber.

[0005] In the current process of oiling polylactic acid fiber spinning, a nozzle structure is often used to apply oil to the fiber surface. However, the nozzle structure can cause uneven oil spraying, resulting in excessive oil in some areas and waste in others. This makes it difficult to ensure that the oil coverage is consistent across the fiber surface, affecting the fiber's softness, smoothness, and antistatic properties.

[0006] Therefore, the present invention provides a polylactic acid fiber spinning device. Summary of the Invention

[0007] To overcome the shortcomings of the prior art: to solve at least one technical problem raised in the background art.

[0008] The technical solution adopted by the present invention to solve its technical problem is as follows: The polylactic acid fiber spinning equipment of the present invention includes an extrusion box, a cooling box is provided on one side of the extrusion box, the outlet end of the extrusion box is fixedly connected to one side of the cooling box, a forming mold is provided through the interior of the cooling box, a condensation controller is fixedly installed on the top of the cooling box, an oiling box is provided on the side of the cooling box away from the extrusion box, an oil storage chamber is fixedly installed on the top of the oiling box, a feeding pipe is fixedly connected to the top of the oil storage chamber, a stirring component for uniformly stirring the oil is provided inside the oil storage chamber, an oiling component is provided below the oil storage chamber, the oiling component includes an oleophilic sponge that can be deformed by compression, a circular inner groove is opened at the center of the inner wall of the oleophilic sponge, and an opening and closing component is provided between the oil storage chamber and the oleophilic sponge, the opening and closing component is used to control the opening or closing of the channel between the oil storage chamber and the oleophilic sponge.

[0009] Preferably, the stirring assembly includes a stirring rod, which is rotatably connected to the inner wall of the oil storage chamber. Multiple stirring blades are uniformly fixedly connected to the outer wall of the stirring rod, and the stirring blades are all located inside the oil storage chamber. A servo motor is fixedly installed on the outside of the oil coating tank, and the output shaft of the servo motor is fixedly connected to one end of the stirring blade.

[0010] Preferably, the opening and closing assembly includes two partition plates. The outer walls of the partition plates are slidably connected to the bottom inner wall of the oil storage chamber, and the side walls of the partition plates are slidably connected to the side walls of the oil coating tank. The two partition plates are staggered vertically, and each partition plate is provided with a pushing assembly above it to drive them to move closer to each other.

[0011] Preferably, the extrusion assembly includes two rotating rods, both of which are rotatably connected to the inner wall of the oiling tank. Rotating push plates are symmetrically fixed to the outer walls of the rotating rods. A gear transmission assembly is provided at one end of the stirring rod, which can be used to drive the two rotating push plates to rotate downwards simultaneously. When the rotating push plates rotate downwards, one side of them can contact one end of the isolation plate.

[0012] Preferably, gear one and gear two are fixedly connected to the outer walls of one end of the two rotating rods, and an inner ring arc-shaped toothed plate and an outer ring arc-shaped toothed plate are fixedly connected to the outer walls of the stirring rods, respectively. The teeth of the inner ring arc-shaped toothed plate can only mesh with the teeth of gear one, and the teeth of the outer ring arc-shaped toothed plate can only mesh with the teeth of gear two.

[0013] Preferably, a torsion spring is fixedly connected to the bottom of each rotating push plate, and the end of the torsion spring away from the rotating push plate is fixedly connected to one side of the oil storage chamber. An elastic component is provided between the isolation plate and the inner wall of the oil storage chamber.

[0014] Preferably, the oiling assembly further includes two extrusion plates, which are respectively attached to both sides of the oleophilic sponge and slidably connected to the bottom of the oiling box. Multiple extrusion push balls are fixedly connected below the isolation plate, and the extrusion push balls are respectively located on the other side of the extrusion plate.

[0015] Preferably, a hollow steel pipe is fixedly installed in the circular inner groove of the oleophilic sponge, and the surface of the hollow steel pipe is evenly provided with several mesh holes.

[0016] Preferably, the bottom of the oiling tank is symmetrically fixedly connected with multiple mounting seats, and a return spring is fixedly connected to one side of each mounting seat. The end of the return spring away from the mounting seat is fixedly connected to one side of the extrusion plate.

[0017] Preferably, the top of the extrusion box is fixedly connected to a feed hopper, the inner wall of the extrusion box is symmetrically rotatably connected to a main shaft, the outer wall of each main shaft is fixedly connected to an extrusion screw, an output gear is fixedly connected to the outer wall of one end of each main shaft, the teeth of the two output gears mesh with each other, a drive motor is fixedly installed on the outer wall of the extrusion box, the output shaft of the drive motor is fixedly connected to one end of one of the main shafts, and a discharge mold is fixedly connected to the outlet end of the extrusion box.

[0018] The beneficial effects of this invention are as follows: 1. The polylactic acid fiber spinning equipment of this invention uses a stirring component to keep the oil in the oil storage chamber in a dynamic flow state, avoiding stratification caused by prolonged stagnation of the oil. If the oil remains stagnant for a long time, different components may separate due to density differences, resulting in inconsistent oil composition on different parts of the fiber surface during subsequent oiling, affecting the quality and performance of the polylactic acid fiber. The stirring component continuously agitates the oil, ensuring thorough mixing of various components and guaranteeing uniform and stable oil.

[0019] 2. The polylactic acid fiber spinning equipment of the present invention precisely controls the opening and closing of the channel between the oil storage chamber and the oleophilic sponge through the opening and closing component, which ensures the smooth progress of the oiling process. In the initial state, the channel is open, and the oil enters the oleophilic sponge under the action of gravity and is absorbed to a saturated state. When the stirring component rotates for one cycle, the opening and closing component closes the channel. At this time, the oiling component squeezes the oleophilic sponge, so that the oil inside can only permeate out from the circular inner groove and coat the fiber, preventing the oil from flowing back into the oil storage chamber and ensuring the effective progress of the oiling operation.

[0020] 3. The polylactic acid fiber spinning equipment of the present invention, through the oiling component, allows the oil to permeate evenly from all directions of the inner groove when the oleophilic sponge is squeezed, so that the oil can coat the fiber in all directions. This avoids the problems of insufficient or excessive local oiling that may occur in traditional oiling methods, ensuring that every part of the fiber surface is evenly coated with oil. During the spinning process, the fiber continuously passes through the circular inner groove of the oleophilic sponge. Since the squeezing and permeation process is continuous and stable, as long as the rotation speed of the stirring component and the squeezing frequency are reasonably controlled, it can be ensured that the amount of oil coating on the fiber remains uniform throughout the entire production process, and there will be no uneven oiling due to the extension of production time or changes in fiber movement. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings.

[0022] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a schematic diagram of the internal structure of the extrusion box in this invention; Figure 3 This is a schematic diagram of the cooling box structure in this invention; Figure 4 This is a schematic diagram of the external structure of the oiling tank in this invention; Figure 5 This is a schematic diagram of the internal structure of the oiling tank in this invention; Figure 6 This is a schematic diagram of the structure of the stirring rod in this invention; Figure 7 This is a schematic diagram of the rotating push plate structure in this invention; Figure 8 This is a schematic diagram of the structure of the oleophilic sponge in this invention; Figure 9 This is a schematic diagram of the hollow pipe structure in this invention.

[0023] In the diagram: 1. Extrusion box; 2. Feed hopper; 3. Main shaft; 4. Extrusion screw; 5. Output gear; 6. Drive motor; 7. Discharge mold; 8. Cooling box; 9. Condenser controller; 10. Oil coating box; 11. Oil storage chamber; 12. Feeding pipe; 13. Stirring rod; 14. Stirring blade; 15. Servo motor; 16. Isolation plate; 17. Rotating rod; 18. Rotating push plate; 19. Gear 1; 20. Inner ring arc-shaped toothed plate; 21. Outer ring arc-shaped toothed plate; 22. Gear 2; 23. Torsion spring; 24. Oleophilic sponge; 25. Hollow steel pipe; 26. Mesh; 27. Extrusion plate; 28. Extrusion push ball; 29. ​​Return spring; 30. Mounting base; 31. Molding mold. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] like Figures 1 to 9 As shown, the present invention provides a technical solution: a polylactic acid fiber spinning device, including an extrusion box 1, a cooling box 8 is provided on one side of the extrusion box 1, the outlet end of the extrusion box 1 is fixedly connected to one side of the cooling box 8, a forming mold 31 is provided through the interior of the cooling box 8, a condenser controller 9 is fixedly installed on the top of the cooling box 8, an oiling box 10 is provided on the side of the cooling box 8 away from the extrusion box 1, an oil storage chamber 11 is fixedly installed on the top of the oiling box 10, a feeding pipe 12 is fixedly connected to the top of the oil storage chamber 11, a stirring assembly for uniformly stirring the oil is provided inside the oil storage chamber 11, an oiling assembly is provided below the oil storage chamber 11, the oiling assembly includes an oleophilic sponge 24 that can be deformed by compression, a circular inner groove is opened at the center of the inner wall of the oleophilic sponge 24, an opening and closing assembly is provided between the oil storage chamber 11 and the oleophilic sponge 24, the opening and closing assembly is used to control the opening or closing of the channel between the oil storage chamber 11 and the oleophilic sponge 24, and a drying device and a winding device are also provided on one side of the oiling box 10.

[0026] During operation: Polylactic acid (PLA) fiber raw materials are derived from starchy agricultural products such as corn, wheat, and sugar beets. After screening and filtration to remove impurities and large particles, the raw materials are molten through high-temperature treatment. The molten raw materials are then added to the extrusion chamber 1 and extruded through a screw conveyor, entering the forming mold 31 in the cooling chamber 8 in filament form from the outlet end. After entering the forming mold 31, the molten PLA raw materials are cooled and shaped into fiber filaments. During this process, the condenser controller 9 monitors and precisely controls the internal temperature of the cooling chamber 8 in real time to ensure stable fiber forming quality. The condenser controller 9 maintains a constant temperature inside the cooling chamber 8 by adjusting the flow rate of the cooling medium or the power of the refrigeration equipment according to preset temperature parameters. The cooled and shaped filaments then enter the oiling chamber 10 and penetrate the circular inner groove of the oleophilic sponge 24. The required coating oil is added to the oil storage chamber 11 through the feeding pipe 12. Commonly used oils are often composite types, generally containing smoothing agents such as mineral oil and synthetic esters, and may also include antistatic agents and emulsifiers to improve fiber performance. Initially, the channel between the oil storage chamber 11 and the oleophilic sponge 24 below is open. At this time, the oil inside the oil storage chamber 11 can enter the oleophilic sponge 24 through the channel under gravity, and the oleophilic sponge 24 can adsorb the oil to saturation due to its oleophilic properties, thus storing the oil. When the stirring component inside chamber 11 moves, it agitates the oil inside the oil storage chamber 11, ensuring that the oil remains in a dynamic flow within the chamber. This prevents the oil from remaining stationary for extended periods, which could lead to stratification. Stratification results in uneven oiling during subsequent applications, affecting the quality and performance of the polylactic acid fiber. The stirring component agitates the oil by rotation, and each rotation cycle closes the channel between the oil storage chamber 11 and the oleophilic sponge 24 via an opening and closing component. After a complete closure, the oleophilic sponge 24 is deformed by being squeezed from both sides by the oiling component. When squeezed, the channel between the oleophilic sponge 24 and the oil storage chamber 11 is closed, preventing the adsorbed oil from flowing back into the chamber. Instead, it permeates out through the circular groove on the inner wall. Since the already formed polylactic acid fibers penetrate the circular groove, the oil permeating from the circular groove is sprayed onto the outside of the polylactic acid fibers. The polylactic acid (PLA) fibers are coated with oil on the wall. This oiling process is repeated. The rotation speed of the stirring components is reasonably controlled according to the production and molding rate of the PLA fibers to ensure that the amount of oil applied is uniform and stable. This ensures that there is enough oil on the fiber surface to improve its performance, while avoiding waste and subsequent processing difficulties caused by excessive oil. After being coated, the fibers enter the drying equipment. Under the action of hot air, the oil on the fiber surface is quickly dried and solidified. Finally, the dried PLA fibers are wound and collected by the winding equipment to complete the entire spinning process. Through the above embodiments, the stirring component ensures that the oil in the oil storage chamber 11 remains in a dynamic flow state, preventing stratification due to prolonged stagnation. If the oil remains stagnant for an extended period, different components may stratify due to density differences, leading to inconsistent oil composition on the fiber surface during subsequent oiling, affecting the quality and performance of the polylactic acid fiber. The stirring component continuously agitates the oil, ensuring thorough mixing of all components and uniform stability. The opening and closing component precisely controls the opening and closing of the channel between the oil storage chamber 11 and the oleophilic sponge 24, guaranteeing a smooth oiling process. Initially, the channel is open, and the oil enters the oleophilic sponge 24 under gravity and is absorbed to saturation. When the stirring component completes one cycle, the opening and closing component closes the channel. At this time, the oiling component squeezes the oleophilic sponge 24, allowing the oil inside to only permeate out through the circular inner groove and coat the fiber, preventing the oil from flowing back into the oil storage chamber 11 and ensuring effective oiling. The oiling assembly... When the oleophilic sponge 24 is squeezed, the oil penetrates evenly from all directions of the inner groove, allowing the oil to fully coat the fiber. This avoids the problems of insufficient or excessive oiling in some areas that may occur with traditional oiling methods, ensuring that every part of the fiber surface is evenly coated with oil. During the spinning process, the fiber continuously passes through the circular inner groove of the oleophilic sponge 24. Since the squeezing and penetration process is continuous and stable, as long as the rotation speed and squeezing frequency of the stirring components are reasonably controlled, the amount of oil coating on the fiber can be kept uniform throughout the entire production process, and there will be no uneven oiling due to the extension of production time or changes in fiber movement.

[0027] like Figures 5 to 6 As shown, the stirring assembly includes a stirring rod 13, which is rotatably connected to the inner wall of the oil storage chamber 11. Multiple stirring blades 14 are uniformly fixedly connected to the outer wall of the stirring rod 13. The stirring blades 14 are all located inside the oil storage chamber 11. A servo motor 15 is fixedly installed on the outside of the oil coating tank 10. The output shaft of the servo motor 15 is fixedly connected to one end of the stirring blade 14.

[0028] During operation: Before the start of polylactic acid fiber spinning production, or when new oil needs to be added to the oil storage chamber 11 or when it needs to be re-stirred to prevent oil separation, the operator will start the servo motor 15. Its output shaft will drive the stirring rod 13 to rotate, thereby driving the stirring blade 14 to rotate inside the oil storage chamber 11. Stirring ensures that the components of the oil are fully mixed, avoiding separation due to density differences, ensuring that the oil components are uniform and stable, thus ensuring that the oil is evenly distributed on the fiber surface during oiling, improving the softness and smoothness of the fiber, preventing static electricity, protecting the integrity of the fiber surface, and reducing production problems caused by uneven oil distribution.

[0029] like Figures 5 to 7As shown, the opening and closing assembly includes two partition plates 16. The outer walls of the partition plates 16 are slidably connected to the bottom inner wall of the oil storage chamber 11, and the side walls of the partition plates 16 are slidably connected to the side walls of the oil coating tank 10. The two partition plates 16 are staggered vertically, and each partition plate 16 is provided with a pushing assembly for moving closer to each other.

[0030] During operation: Initially, the two partition plates 16 are separated from each other. At this time, the channel between the bottom of the oil storage chamber 11 and the oleophilic sponge 24 is open, and the oil inside the oil storage chamber 11 can flow downward and be absorbed by the oleophilic sponge 24 to a saturated state. When the stirring rod 13 rotates, it will simultaneously move the two partition plates 16 closer to each other through the extrusion component. When the two partition plates 16 move to a docking state, the channel between the oil storage chamber 11 and the oleophilic sponge 24 will be closed. Then, because the two partition plates 16 are staggered vertically, they can continue to move closer to each other under the action of the extrusion component. During this movement, the oiling component will move. During this process, the channel remains closed. The oiling component sprays the oil absorbed in the oleophilic sponge 24 evenly and accurately onto the outer wall of the polylactic acid fiber by squeezing the oleophilic sponge 24, ensuring that the fiber surface is evenly coated with oil and improving fiber quality.

[0031] like Figures 5 to 7 As shown, the extrusion assembly includes two rotating rods 17, both of which are rotatably connected to the inner wall of the oiling tank 10. Rotating push plates 18 are symmetrically fixed to the outer walls of the rotating rods 17. A gear transmission assembly is provided at one end of the stirring rod 13, which can be used to drive the two rotating push plates 18 to rotate downwards at the same time. When the rotating push plates 18 rotate downwards, one side of them can contact one end of the isolation plate 16.

[0032] During operation: In the initial state, the rotating pusher plate 18 is in a horizontal position and does not contact the isolation plate 16. When the stirring rod 13 rotates, it drives the two rotating rods 17 to rotate through the gear transmission assembly. The two rotating rods 17 rotate in opposite directions, so that the two rotating pushers 18 rotate downward around the rotating rods 17 as the axis. When the rotating pusher plate 18 rotates downward, one side of it will gradually approach one end of the isolation plate 16. After the two contact, the rotating pusher plate 18 continues to rotate and will squeeze one end of the isolation plate 16, causing the two isolation plates 16 to move closer to each other along the bottom inner wall of the oil storage chamber 11 until the two isolation plates 16 are joined together, closing the channel between the oil storage chamber 11 and the oleophilic sponge 24. Then, as the rotating pusher plate 18 continues to rotate, with the cooperation of the staggered structure of the isolation plates 16, it continues to squeeze the isolation plates 16 to bring them closer to each other, thereby driving the oiling assembly to squeeze the oleophilic sponge 24, and uniformly and stably coating the oil adsorbed in the oleophilic sponge 24 onto the polylactic acid fiber.

[0033] like Figures 6 to 7 As shown, gear 19 and gear 22 are fixedly connected to the outer walls of one end of the two rotating rods 17, respectively. Inner ring arc toothed plate 20 and outer ring arc toothed plate 21 are fixedly connected to the outer walls of the stirring rod 13, respectively. The teeth of the inner ring arc toothed plate 20 can only mesh with the teeth of gear 19, and the teeth of the outer ring arc toothed plate 21 can only mesh with the teeth of gear 22.

[0034] During operation: The inner arc-shaped toothed plate 20 and the outer arc-shaped toothed plate 21 form a 180-degree angle. When the stirring rod 13 rotates, it synchronously drives the inner arc-shaped toothed plate 20 and the outer arc-shaped toothed plate 21 to perform circular motion around the axis of the stirring rod 13. When the inner arc-shaped toothed plate 20 rotates, its teeth mesh with the inner side of the teeth of gear 19. The rotation of gear 19 drives one of the rotating rods 17 to rotate, while at the same time, the teeth of the outer arc-shaped toothed plate 21 mesh with the teeth of gear 22. The gear 22 meshes with the outer teeth of the gear, and the rotation of the gear 22 will drive the other rotating rod 17 to rotate. Due to the position setting of the inner ring arc toothed plate 20 and the outer ring arc toothed plate 21, when the stirring rod 13 rotates in a certain direction, the two rotating rods 17 rotate in opposite directions, so that the two rotating push plates 18 rotate downward at the same time, and apply a stable extrusion force to one end of the two isolation plates 16 at the same time, ensuring that the subsequent extrusion and oiling operations can be carried out accurately and orderly.

[0035] like Figures 6 to 7 As shown, torsion springs 23 are fixedly connected to the bottom of the rotating push plate 18. The end of the torsion spring 23 away from the rotating push plate 18 is fixedly connected to one side of the oil storage chamber 11. An elastic component is provided between the isolation plate 16 and the inner wall of the oil storage chamber 11.

[0036] During operation: When the rotating push plate 18 rotates downwards, it will compress the torsion spring 23 and cause deformation. After the inner ring arc-shaped toothed plate 20 and the outer ring arc-shaped toothed plate 21 complete the meshing with gear 19 and gear 22, and rotate to a position away from gear 19 and gear 22, the rotating push plate 18 will rotate in the opposite direction and reset under the elastic force of the torsion spring 23. After resetting, no more squeezing force will be applied to one end of the isolation plate 16. Then, the two isolation plates 16 can be reset and moved away from each other under the action of the elastic component, returning to the initial state. At this time, the oiling process of the oleophilic sponge 24 has been completed. After the isolation plate 16 resets and moves, the channel between the oil storage chamber 11 and the oleophilic sponge 24 can be opened again. The oleophilic sponge 24 continues to absorb the oil inside the oil storage chamber 11 to a saturated state, preparing for the next round of oiling operation.

[0037] like Figures 8 to 9As shown, the oiling assembly also includes two extrusion plates 27, which are respectively attached to both sides of the oleophilic sponge 24. The extrusion plates 27 are slidably connected to the bottom of the oiling box 10. Multiple extrusion push balls 28 are fixedly connected to the bottom of the isolation plate 16, and the extrusion push balls 28 are respectively located on the other side of the extrusion plate 27.

[0038] During operation: When the two isolation plates 16 approach each other to form a docking relationship and close the channel, the extrusion push ball 28 will move closer to the side of the extrusion plate 27. When the two isolation plates 16 dock, the extrusion push ball 28 is just in contact with one side of the extrusion plate 27. Then, as the two isolation plates 16 continue to move, the channel remains closed. At this time, the extrusion push ball 28 continues to move and will squeeze the extrusion plate 27, causing the two extrusion plates 27 to move closer to each other. The extrusion plates 27 squeeze the oleophilic sponge 24 from both sides. After the oleophilic sponge 24 is squeezed, the oil adsorbed inside is subjected to pressure and can only diffuse to various parts of the circular inner groove inside the oleophilic sponge 24. The evenly sprayed oil can accurately cover the surface of polylactic acid fiber, providing good lubrication and protection for the fiber.

[0039] like Figures 8 to 9 As shown, a hollow steel pipe 25 is fixedly installed in the circular inner groove of the oleophilic sponge 24, and a number of mesh holes 26 are evenly opened on the surface of the hollow steel pipe 25.

[0040] During operation: Since a hollow steel pipe 25 is fixedly installed in the circular inner groove of the oleophilic sponge 24 and several mesh holes 26 are evenly opened on its surface, the oil will quickly enter the hollow steel pipe 25 and be evenly sprayed out through the evenly distributed mesh holes 26. Under pressure, the oil can be sprayed out from each mesh hole 26 in a relatively balanced manner. Compared with the oil seeping out irregularly directly from the surface of the oleophilic sponge 24, it can ensure that the oil is more evenly distributed in the area covered by the oleophilic sponge 24, so that each part of the polylactic acid fiber can obtain a relatively consistent amount of oil coverage.

[0041] like Figures 8 to 9 As shown, multiple mounting bases 30 are symmetrically fixedly connected to the bottom of the oiling tank 10. A return spring 29 is fixedly connected to one side of each mounting base 30. The end of the return spring 29 away from the mounting base 30 is fixedly connected to one side of the extrusion plate 27.

[0042] During operation: When the extrusion plate 27 moves closer to each other under the pushing force of the extrusion pusher 28, it will stretch the return spring 29 and cause it to deform. When the two isolation plates 16 are no longer pushed by the extrusion pusher assembly and move away from each other to reset, the channel between the oil storage chamber 11 and the oleophilic sponge 24 is reopened. At this time, the elastic force generated by the deformation of the return spring 29 will cause the extrusion plate 27 to move in the opposite direction to reset, allowing the extruded oleophilic sponge 24 to recover its deformation. At this time, the channel is fully open, and the oleophilic sponge 24 can continue to absorb the oil inside the oil storage chamber 11 until it reaches saturation.

[0043] like Figures 1 to 2 As shown, the top of the extrusion box 1 is fixedly connected to the feed hopper 2, the inner wall of the extrusion box 1 is symmetrically rotatably connected to the main shaft 3, the outer wall of the main shaft 3 is fixedly connected to the extrusion screw 4, the outer wall of one end of the main shaft 3 is fixedly connected to the output gear 5, the teeth of the two output gears 5 mesh with each other, the outer wall of the extrusion box 1 is fixedly installed with the drive motor 6, the output shaft of the drive motor 6 is fixedly connected to one end of one of the main shafts 3, and the outlet end of the extrusion box 1 is fixedly connected to the discharge mold 7.

[0044] During operation: After the material enters the extrusion box 1 from the feed hopper 2, the drive motor 6 starts, and its output shaft drives the main rotating shaft 3 connected to it to rotate. The main rotating shaft 3 is driven by the output gear 5 fixed on the outer wall to mesh with the output gear 5 on another main rotating shaft 3, so that the two main rotating shafts 3 rotate synchronously in opposite directions, thereby driving the extrusion screw 4 to rotate, pushing the material to move towards the discharge mold 7 and extruding it into shape.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polylactic acid fiber spinning device, comprising an extrusion box, characterized in that: A cooling box is provided on one side of the extrusion box, and the outlet end of the extrusion box is fixedly connected to one side of the cooling box. A forming mold is installed through the interior of the cooling box. A condensation controller is fixedly installed on the top of the cooling box. An oiling box is provided on the side of the cooling box away from the extrusion box. An oil storage chamber is fixedly installed on the top of the oiling box. A feeding pipe is fixedly connected to the top of the oil storage chamber. A stirring component for uniformly stirring the oil is provided inside the oil storage chamber. An oiling component is provided below the oil storage chamber. The oiling component includes an oleophilic sponge that can be deformed by extrusion. A circular inner groove is opened at the center of the inner wall of the oleophilic sponge. An opening and closing component is provided between the oil storage chamber and the oleophilic sponge. The opening and closing component is used to control the opening or closing of the channel between the oil storage chamber and the oleophilic sponge.

2. The polylactic acid fiber spinning equipment according to claim 1, characterized in that: The stirring assembly includes a stirring rod, which is rotatably connected to the inner wall of the oil storage chamber. Multiple stirring blades are uniformly fixedly connected to the outer wall of the stirring rod, and the stirring blades are all located inside the oil storage chamber. A servo motor is fixedly installed on the outside of the oil coating tank, and the output shaft of the servo motor is fixedly connected to one end of the stirring blade.

3. The polylactic acid fiber spinning equipment according to claim 2, characterized in that: The opening and closing assembly includes two partition plates. The outer walls of the partition plates are slidably connected to the bottom inner wall of the oil storage chamber, and the side walls of the partition plates are slidably connected to the side walls of the oil coating tank. The two partition plates are staggered vertically, and each partition plate is equipped with a pushing assembly above it to drive them to move closer to each other.

4. The polylactic acid fiber spinning equipment according to claim 3, characterized in that: The extrusion assembly includes two rotating rods, both of which are rotatably connected to the inner wall of the oiling tank. Rotating push plates are symmetrically fixed to the outer walls of the rotating rods. A gear transmission assembly is provided at one end of the stirring rod, which can be used to drive the two rotating push plates to rotate downwards simultaneously. When the rotating push plates rotate downwards, one side of them can contact one end of the isolation plate.

5. The polylactic acid fiber spinning equipment according to claim 4, characterized in that: Gear 1 and Gear 2 are fixedly connected to the outer walls of one end of the two rotating rods, respectively. An inner ring arc-shaped toothed plate and an outer ring arc-shaped toothed plate are fixedly connected to the outer walls of the stirring rods, respectively. The teeth of the inner ring arc-shaped toothed plate can only mesh with the teeth of Gear 1, and the teeth of the outer ring arc-shaped toothed plate can only mesh with the teeth of Gear 2.

6. The polylactic acid fiber spinning equipment according to claim 5, characterized in that: The bottom of each rotating push plate is fixedly connected with a torsion spring. The end of the torsion spring away from the rotating push plate is fixedly connected to one side of the oil storage chamber. An elastic component is provided between the isolation plate and the inner wall of the oil storage chamber.

7. A polylactic acid fiber spinning device according to claim 6, characterized in that: The oiling assembly also includes two extrusion plates, which are respectively attached to both sides of the oleophilic sponge and slidably connected to the bottom of the oiling box. Multiple extrusion push balls are fixedly connected to the bottom of the isolation plate, and the extrusion push balls are respectively located on the other side of the extrusion plate.

8. The polylactic acid fiber spinning equipment according to claim 7, characterized in that: A hollow steel pipe is fixedly installed in the circular inner groove of the oleophilic sponge, and the surface of the hollow steel pipe is evenly provided with several mesh holes.

9. A polylactic acid fiber spinning device according to claim 8, characterized in that: The bottom of the oiling tank is symmetrically fixedly connected with multiple mounting bases. Each mounting base has a return spring fixedly connected to one side. The end of the return spring away from the mounting base is fixedly connected to one side of the extrusion plate.

10. A polylactic acid fiber spinning device according to claim 9, characterized in that: The top of the extrusion box is fixedly connected to a feed hopper. The inner wall of the extrusion box is symmetrically connected to a main shaft. The outer wall of the main shaft is fixedly connected to an extrusion screw. An output gear is fixedly connected to the outer wall of one end of the main shaft. The teeth of the two output gears mesh with each other. A drive motor is fixedly installed on the outer wall of the extrusion box. The output shaft of the drive motor is fixedly connected to one end of one of the main shafts. The outlet end of the extrusion box is fixedly connected to a discharge mold.

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