Production device of flame-retardant anti-molten-drop chinlon 6 filaments

Abstract

The invention relates to the technical field of chemical fiber production equipment, and discloses a production device of flame-retardant anti-molten-drop chinlon 6 filaments, which comprises a production platform and a console arranged on the production platform, and further comprises a feeding assembly, the feeding assembly comprises a chinlon 6 slice feeding cylinder, a first-stage mixing assembly is arranged below the chinlon 6 slice feeding cylinder, and a second-stage mixing assembly is arranged below the first-stage mixing assembly. The tail end of the first-stage mixing assembly is connected with the second-stage mixing assembly, and the melting assembly is nested on the outer side of the first-stage mixing assembly. According to the device, a two-stage mixing structure of double-screw staggered shearing and planetary gear meshing shearing is adopted, accurate quantity control feeding is achieved through the metering screw, a global uniform shearing field is constructed, a mixing path is prolonged, the technical problems of flame retardant agglomeration and uneven mixing in traditional single-stage mixing are solved, and the flame retardant mixing efficiency is improved. According to the invention, the dispersion precision of the flame retardant in the melt is ensured to reach the required dispersion precision of filament molding, the spinneret orifice blockage and the linear density deviation are avoided through filter plate filtration and multi-stage parameter regulation and control, and the flame-retardant consistency and the molding qualification rate of the chinlon 6 filament are obviously improved.

Description

Technical Field

[0001] This invention relates to the field of chemical fiber production equipment technology, specifically to a production device for flame-retardant and anti-drip nylon 6 filament. Background Technology

[0002] Nylon 6 filament is widely used in textiles and industrial fabrics due to its excellent mechanical properties and processing characteristics. However, the flammability of pure nylon 6 and its ability to produce molten droplets during combustion limit its application in flame-retardant applications. Existing flame-retardant and anti-dripping nylon 6 filament production equipment mainly achieves modification by adding flame retardants to the melt, but there are significant technical deficiencies in the melt mixing mechanism and production process monitoring mechanism.

[0003] Existing production equipment generally uses single-screw extruders or simple stirring-type mixing structures. Single-screw extruders mainly rely on the screw's helical pushing force to achieve mixing. The shear block layout is sparse and the helix angle is fixed. The shearing effect on the melt is concentrated in a local area and cannot form a uniform shear field over the entire area. The simple stirring structure lacks a continuous shear path. The melt and flame retardant can only achieve surface mixing and cannot penetrate into the interior of the melt. The melt flow path of the single-stage mixing structure is linear. The flame retardant (especially powder flame retardant) has a short residence time in the melt and is pushed to the spinning stage before it is fully dispersed. This leads to the widespread agglomeration of flame retardant particles, which far exceeds the dispersion precision required for filament forming. Summary of the Invention

[0004] The purpose of this invention is to provide a production apparatus for flame-retardant and anti-drip nylon 6 filament to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a production device for flame-retardant and anti-drip nylon 6 filament, comprising a production platform and a control console disposed on the production platform, and further comprising a feeding assembly, the feeding assembly comprising a nylon 6 chip feeding cylinder, a primary mixing assembly disposed below the nylon 6 chip feeding cylinder, a secondary mixing assembly connected to the tail end of the primary mixing assembly, a melting assembly nested outside the primary mixing assembly, a filtering spinneret assembly connected below the secondary mixing assembly, and a drawing and winding assembly disposed below the filtering spinneret assembly; An inclined ladder is installed on the production platform, and the inclined ladder is welded to one side of the nylon 6 chip feeding cylinder. The primary mixing assembly includes a screw motor, a main screw, a secondary screw, gears, a spiral pusher plate, a high-shear block, a dispersion mixing plate, and a mixing cylinder. The gears are welded to one end of the main screw and the secondary screw and mesh with each other. The main screw is connected to one end of the screw motor. The spiral pusher plates are nested and welded to the outside of the main screw and the secondary screw and are staggered and abutting each other.

[0006] Furthermore, the outer side of the spiral pusher plate abuts against the inner wall of the mixing cylinder, and the high shear block is provided with several and symmetrically welded to the main screw and the auxiliary screw. A dispersion mixing plate is provided on one side of the symmetrically arranged high shear block, and several radial through holes are provided on the dispersion mixing plate. The high shear block and the dispersion mixing plate are arranged alternately.

[0007] Start the screw motor, which drives the main screw. The main screw drives the auxiliary screw to rotate synchronously through gears, which in turn drives the spiral pusher plate, high shear block, and dispersion mixing plate to rotate. The spiral pusher plate pushes the material forward, the high shear block performs strong shearing and dispersion on the material, and the radial through holes of the dispersion mixing plate can enhance the melt convection mixing.

[0008] Furthermore, the secondary mixing component includes a gear cylinder, a solar extrusion gear, a planetary extrusion gear, a central shaft, a reducer, an extrusion motor, and a feeding cylinder. The inner side of the gear cylinder is provided with serrations. The planetary extrusion gear and the solar extrusion gear are symmetrically arranged and mesh with each other. A straight shaft is welded between the symmetrically arranged planetary extrusion gears.

[0009] Furthermore, solar extrusion gears are welded to both ends of the central shaft, one end of the extrusion motor is connected to a reducer, one end of the reducer is connected to the solar extrusion gear, the feed cylinder is fixed between the reducer and the gear cylinder by bolts, the planetary extrusion gear meshes with saw teeth and rotates in cooperation, and both ends of the gear cylinder are fixed by screws and connected to the mixing cylinder and the feed cylinder.

[0010] The melt enters the secondary mixing component, where the extrusion motor drives the solar extrusion gear to rotate via a reducer. The planetary extrusion gear meshes with the solar gear and engages with the serrations of the gear cylinder, performing secondary shearing and dispersion on the melt. Finally, the melt is discharged through the discharge cylinder. This two-stage mixing process, involving alternating shearing by twin screws and meshing shearing by planetary gears, replaces the traditional single-stage structure, extends the mixing path, enhances the shear field, and solves the problems of flame retardant agglomeration and uneven mixing.

[0011] Furthermore, a screen is provided inside the nylon 6 chip feeding cylinder, and a connecting pipe is connected to the bottom of the nylon 6 chip feeding cylinder via a flange. The bottom of the connecting pipe is connected to a mixing cylinder. A flame retardant powder feeding cylinder is provided on one side of the nylon 6 chip feeding cylinder. A support plate is fixed to the top of the flame retardant powder feeding cylinder with screws. A servo motor is fixed on the support plate. One end of the servo motor is connected to a motor shaft, and a metering screw is welded to the bottom of the motor shaft. The bottom of the flame retardant powder feeding cylinder is connected to the mixing cylinder via a flange.

[0012] The operator first climbs up the inclined ladder to the top of the feeding cylinder and puts the nylon 6 chips into the nylon 6 chip feeding cylinder. After impurities are filtered out by the screen, the chips enter the mixing cylinder through the pipe. Flame retardant powder is then added to the flame retardant powder feeding cylinder. The servo motor drives the metering screw through the motor shaft to precisely control the feeding amount of flame retardant powder, which is then synchronously conveyed to the mixing cylinder to mix with the molten nylon 6 chips. This avoids fluctuations in the concentration of flame retardant powder and improves the stability of flame retardant performance.

[0013] Furthermore, the melting assembly includes a heating cylinder, which is composed of upper and lower symmetrically arranged heating shells, which are fastened together by bolts at both ends. The outer side of the heating cylinder is provided with several heat dissipation holes, and the inner side of the heating cylinder is attached to the outer wall of the mixing cylinder. An electrical control box is provided on the outside of the heating shell, and the electrical control box is electrically connected to the control console.

[0014] The control console controls the temperature of the heating shell through the electrical control box, heating and melting the materials in the mixing drum to form a uniform melt. The heat dissipation holes on the heating shell are used to enhance heat dissipation efficiency, making it suitable for the enclosed heating scenario of cylindrical heating equipment.

[0015] Furthermore, the filter spinneret assembly includes a filter box, a top feed pipe, a bottom feed pipe, a filter plate, and a spinneret. The top feed pipe is welded between the feed cylinder and the filter box. The filter box has a groove, and the filter plate is fitted into the groove and slidably engaged. A sealed door is provided on one side of the groove. The bottom feed pipe connects to the bottom of the groove, and the spinneret is fixed to the bottom end of the bottom feed pipe with screws.

[0016] The melt is squeezed and falls through the feed cylinder into the top feed pipe, then enters the filter box. After impurities are filtered by the filter plate, it is conveyed to the spinneret through the bottom feed pipe and sprayed out to form nascent nylon 6 filaments. The filter plate filters impurities to prevent the spinneret holes from clogging.

[0017] Furthermore, the drafting and winding assembly includes a back plate, guide wheels, guide rollers, guide rings, traction wheels, guide rods, and winding rollers. The guide wheels and guide rollers are staggered, and the drafting height of the guide wheels relative to the back plate is higher than that of the guide rollers. The two ends of the guide wheels are fitted into the back plate and rotate to engage. The guide ring is located below the guide rollers.

[0018] Furthermore, the traction wheel is provided in two and arranged at an angle, one end of the traction wheel passes through the back plate and is connected to the traction motor. The traction motor is fixed to the back plate by screws. The take-up roller is located below the traction wheel and one end is connected to the take-up motor. The guide rod is installed between the take-up roller and the traction wheel, and the guide rod is provided with several partition rods.

[0019] The nascent filaments are interwoven with the guide rollers and guide wheels. Due to the difference in height between the two rollers, the nascent filaments are tensioned and guided. Then, guided by the guide ring, they enter the traction rollers. The traction motor drives the two traction rollers to rotate, and the speed difference achieves drafting. The drafted filaments are sorted by the guide rod's separator bar, and the winding motor drives the winding rollers to complete the winding. The drafting and winding assembly improves the mechanical properties of the filaments through multi-stage guidance and traction speed difference, and the winding is neat and convenient for subsequent processing.

[0020] Furthermore, a detection and control component is added to the filter spinneret assembly and the drawing and winding assembly. The detection and control component includes a pressure sensor, a flow sensor, a viscosity sensor, and a tension sensor. The pressure sensor is bolted to one side of the top feed pipe and extends into it. The flow sensor is located between the bottom feed pipes. The viscosity sensor is installed at the bottom end of the bottom feed pipe and extends into it. The tension sensor is welded to the back plate and located between the traction wheels.

[0021] When online monitoring of the production process is required to improve product quality, the added detection and control components include pressure sensors that monitor pressure changes between the melt filter mechanism and the spinneret assembly in real time. When the pressure rises sharply, it can indicate filter blockage or abnormal melt viscosity, allowing the airtight door to be opened for troubleshooting. When the pressure drops sharply, it can indicate melt leakage or feeding interruption, preventing spinneret interruption or filament forming defects. The flow sensor can accurately measure the melt delivery flow rate, preventing flow fluctuations from causing inconsistent filament output from the spinneret orifice, which in turn leads to deviations in filament linear density. After receiving the signal, the control console can fine-tune the twin screw speed to ensure that the melt output flow rate matches the requirements of the spinneret assembly. The viscosity sensor uses an online capillary method to detect melt viscosity in real time. An abnormally high viscosity usually corresponds to flame retardant agglomeration or excessively low melt temperature, while an abnormally low viscosity may be due to excessive flame retardant or excessively high temperature. The control console adjusts the viscosity by regulating the twin-screw speed and barrel heating temperature, and simultaneously adjusts the flame retardant feed rate by regulating the servo motor speed, thereby restoring the viscosity to a normal value. The tension sensor detects the tension of the wound filament and provides real-time feedback to the control console. The control console maintains stable tension by regulating the traction motor speed, preventing excessive tension from causing filament breakage or insufficient tension from causing filament slippage. This ensures uniform orientation of macromolecular chains during drawing and improves the stability of filament mechanical properties. The detection and control components collect melt and filament parameters in real time, and the control console adjusts process parameters accordingly, replacing traditional manual offline detection, reducing the batch production of defective products, and improving production efficiency.

[0022] Compared with the prior art, the present invention provides a production apparatus for flame-retardant and anti-drip nylon 6 filament, which has the following beneficial effects: 1. The production device for flame-retardant and anti-dripping nylon 6 filament utilizes a two-stage mixing structure of twin-screw staggered shearing and planetary gear meshing shearing, combined with precise feeding control by a metering screw, to create a uniform shearing field across the entire area and extend the mixing path. This solves the technical pain points of flame retardant agglomeration and uneven mixing in traditional single-stage mixing, ensuring that the flame retardant achieves the dispersion precision required for filament forming in the melt. Simultaneously, filtration by filter plates and multi-stage parameter control avoid spinneret blockage and linear density deviation, significantly improving the flame retardant consistency and forming qualification rate of nylon 6 filament.

[0023] 2. The production equipment for flame-retardant and anti-dripping nylon 6 filament integrates online detection and control components for pressure, flow rate, viscosity, and tension, and coordinates key parameters such as twin-screw speed, heating temperature, and feed rate to replace the traditional manual offline detection mode. This real-time avoidance of production failures such as melt leakage, filter media blockage, and filament breakage reduces the batch production of defective products. At the same time, the drawing and winding assembly, through multi-stage guidance and speed difference design, balances the improvement of filament mechanical properties and winding regularity, significantly reducing the probability of production interruption and subsequent processing costs, and realizing continuous, high-precision, and stable production of flame-retardant nylon 6 filament. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the feeding assembly structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the flame retardant powder feeding cylinder of the present invention; Figure 4 This is a schematic diagram of the combined structure of some components of the present invention; Figure 5 This is a schematic diagram of the primary mixing component structure of the present invention; Figure 6 This is a schematic diagram of the secondary mixing component structure of the present invention; Figure 7 This is a schematic diagram of the internal structure of the gear cylinder of the present invention; Figure 8 This is a schematic diagram of the fusion assembly structure of the present invention; Figure 9 This is a schematic diagram of the combined structure of some components of the present invention; Figure 10 This is a schematic diagram of the filter spinneret assembly structure of the present invention; Figure 11 This is a schematic diagram of the internal structure of the filter box of the present invention; Figure 12 This is a schematic diagram of the drawing and winding assembly structure of the present invention; Figure 13 This is a partial structural diagram of the drawing and winding assembly of the present invention; Figure 14 This is a schematic diagram of the detection and control component structure of the present invention.

[0025] In the diagram: 1. Production platform; 2. Control console; 3. Feeding assembly; 4. Primary mixing assembly; 5. Secondary mixing assembly; 6. Melting assembly; 7. Filtering and spinning assembly; 8. Drawing and winding assembly; 9. Detection and control assembly; 11. Inclined ladder; 31. Nylon 6 chip feed cylinder; 41. Screw motor; 42. Main screw; 43. Auxiliary screw; 44. Gear; 45. Spiral pusher plate; 46. High-shear block; 47. Dispersion and mixing plate; 48. Mixing cylinder; 51. Gear cylinder; 52. Solar extrusion gear; 53. Planetary extrusion gear; 531. Straight shaft; 54. Central shaft; 55. Reducer; 56. Extrusion motor; 57. Feeding cylinder; 61. Heating cylinder; 62. Heat dissipation hole; 63. Electrical control box; 71. 72. Filter box; 73. Top feed pipe; 74. Bottom feed pipe; 75. Filter plate; 76. Spinneret; 87. Back plate; 88. Guide wheel; 89. Guide roller; 80. Guide ring; 81. Traction wheel; 82. Guide rod; 83. Take-up roller; 94. Pressure sensor; 95. Flow sensor; 96. Viscosity sensor; 97. Tension sensor; 38. Screen; 39. Through pipe; 30. Flame retardant powder feed cylinder; 31. Support plate; 32. Servo motor; 33. Motor shaft; 34. Metering screw; 65. Heating shell; 76. Box groove; 77. Sealing door; 88. Traction motor; 89. Take-up motor; 80. Divider rod; 51. Sawtooth; 47. Radial through hole. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0027] Please see Figures 1-13 A production apparatus for flame-retardant and anti-drip nylon 6 filament includes a production platform 1 and a control console 2 on the production platform 1, and a feeding assembly 3. The feeding assembly 3 includes a nylon 6 chip feeding cylinder 31. A primary mixing assembly 4 is provided below the nylon 6 chip feeding cylinder 31. A secondary mixing assembly 5 is connected to the tail end of the primary mixing assembly 4. A melting assembly 6 is nested outside the primary mixing assembly 4. A filter spinning assembly 7 is connected below the secondary mixing assembly 5. A drawing and winding assembly 8 is provided below the filter spinning assembly 7. An inclined ladder 11 is installed on the production platform 1, and the inclined ladder 11 is welded to one side of the nylon 6 chip feeding cylinder 31; The primary mixing component 4 includes a screw motor 41, a main screw 42, an auxiliary screw 43, a gear 44, a spiral pusher plate 45, a high-shear block 46, a dispersion mixing plate 47, and a mixing cylinder 48. The gear 44 is welded to one end of the main screw 42 and the auxiliary screw 43 respectively and meshes with each other. The main screw 42 is connected to one end of the screw motor 41. The spiral pusher plate 45 is nested and welded to the outside of the main screw 42 and the auxiliary screw 43 respectively and is staggered and abuts against each other. Furthermore, the outer side of the spiral pusher plate 45 abuts against the inner wall of the mixing cylinder 48, and the high shear block 46 is provided with several and symmetrically welded to the main screw 42 and the auxiliary screw 43. A dispersing mixing plate 47 is provided on one side of the symmetrically arranged high shear block 46, and several radial through holes 471 are provided on the dispersing mixing plate 47. The high shear block 46 and the dispersing mixing plate 47 are arranged alternately.

[0028] Start the screw motor 41, which drives the main screw 42. The main screw 42 drives the auxiliary screw 43 to rotate synchronously through the gear 44, which in turn drives the spiral pusher plate 45, the high shear block 46, and the dispersion mixing plate 47 to rotate. The spiral pusher plate 45 pushes the material forward, the high shear block 46 performs strong shearing and dispersion on the material, and the radial through holes 471 of the dispersion mixing plate 47 can enhance the convective mixing of the melt.

[0029] Furthermore, the secondary mixing component 5 includes a gear cylinder 51, a solar extrusion gear 52, a planetary extrusion gear 53, a central shaft 54, a reducer 55, an extrusion motor 56, and a feeding cylinder 57. The inner side of the gear cylinder 51 is provided with serrations 511. The planetary extrusion gear 53 and the solar extrusion gear 52 are symmetrically arranged and mesh with each other. A straight shaft 531 is welded between the symmetrically arranged planetary extrusion gears 53.

[0030] Furthermore, solar extrusion gears 52 are welded to both ends of the central shaft 54. One end of the extrusion motor 56 is connected to the reducer 55, and the other end of the reducer 55 is connected to the solar extrusion gear 52. The feed cylinder 57 is fixed between the reducer 55 and the gear cylinder 51 by bolts. The planetary extrusion gear 53 meshes with the saw teeth 511 and rotates. Both ends of the gear cylinder 51 are fixed by screws and connected to the mixing cylinder 48 and the feed cylinder 57.

[0031] The melt enters the secondary mixing component 5. The extrusion motor 56 drives the sun extrusion gear 52 to rotate via the reducer 55. The planetary extrusion gear 53 rotates with the sun gear and engages with the serrations 511 of the gear cylinder 51 to perform secondary shearing and dispersion of the melt. Finally, it is discharged through the discharge cylinder 57. The two-stage mixing process, which combines the staggered shearing of the twin screws and the meshing shearing of the planetary gears, replaces the traditional single-stage structure, extends the mixing path, enhances the shearing field, and solves the problems of flame retardant agglomeration and uneven mixing.

[0032] Furthermore, a screen 311 is provided inside the nylon 6 chip feeding cylinder 31. The bottom end of the nylon 6 chip feeding cylinder 31 is connected to a pipe 32 via a flange. The bottom end of the pipe 32 is connected to a mixing cylinder 48. A flame retardant powder feeding cylinder 33 is provided on one side of the nylon 6 chip feeding cylinder 31. A support plate 34 is fixed to the top of the flame retardant powder feeding cylinder 33 by screws. A servo motor 35 is fixed on the support plate 34. One end of the servo motor 35 is connected to a motor shaft 351. A metering screw 36 is welded to the bottom end of the motor shaft 351. The bottom of the flame retardant powder feeding cylinder 33 is connected to the mixing cylinder 48 via a flange.

[0033] The operator first uses the inclined ladder 11 to climb to the top of the feeding cylinder 31 and puts the nylon 6 chips into the nylon 6 chip feeding cylinder 31. After impurities are filtered by the screen 311, the chips enter the mixing cylinder 48 through the pipe 32. Flame retardant powder is added to the flame retardant powder feeding cylinder 33. The servo motor 35 drives the metering screw 36 through the motor shaft 351 to precisely control the feeding amount of flame retardant powder and simultaneously deliver it to the mixing cylinder 48 to mix with the molten nylon 6 chips. This can avoid fluctuations in the concentration of flame retardant powder and improve the stability of flame retardant performance.

[0034] Furthermore, the melting component 6 includes a heating cylinder 61, which is composed of heating shells 611 arranged symmetrically on the upper and lower sides. The two are fastened together by bolts at both ends. The outer side of the heating cylinder 61 is provided with several heat dissipation holes 62. The inner side of the heating cylinder 61 is attached to the outer wall of the mixing cylinder 48. An electrical control box 63 is provided on the outer side of the heating shell 611, and the electrical control box 63 is electrically connected to the control console 2.

[0035] The control console 2 controls the temperature of the heating shell 611 through the electrical control box 63, heating and melting the material in the mixing cylinder 48 to form a uniform melt. The heat dissipation holes 62 on the heating shell 611 are used to enhance heat dissipation efficiency and are suitable for the enclosed heating scenario of cylindrical heating equipment.

[0036] Furthermore, the filter spinneret assembly 7 includes a filter box 71, a top feed pipe 72, a bottom feed pipe 73, a filter plate 74, and a spinneret 75. The top feed pipe 72 is welded between the feed cylinder 57 and the filter box 71. The filter box 71 has a groove 711. The filter plate 74 is fitted into the groove 711 and slides. A sealed door 712 is provided on one side of the groove 711. The bottom feed pipe 73 connects to the bottom of the groove 711. The spinneret 75 is fixed to the bottom end of the bottom feed pipe 73 by screws.

[0037] The melt is squeezed and falls through the feed cylinder 57 into the top feed pipe 72, and then enters the box groove 711 of the filter box 71. After impurities are filtered by the filter plate 74, it is conveyed to the spinneret 75 through the bottom feed pipe 73 and sprayed out to form nascent nylon 6 filaments. The filter plate 74 filters impurities to prevent the spinneret holes from clogging.

[0038] Furthermore, the drafting and winding assembly 8 includes a back plate 81, a guide wheel 82, a guide roller 83, a guide ring 84, a traction wheel 85, a guide rod 86, and a winding roller 87. The guide wheel 82 and the guide roller 83 are staggered, and the drafting height of the guide wheel 82 relative to the back plate 81 is higher than that of the guide roller 83. The two ends of the guide wheel 82 are fitted into the back plate 81 and rotated to engage. The guide ring 84 is located below the guide roller 83.

[0039] Furthermore, there are two traction wheels 85 arranged at an angle, one end of which passes through the back plate 81 and is connected to the traction motor 811. The traction motor 811 is fixed to the back plate 81 by screws. The take-up roller 87 is located below the traction wheel 85 and one end is connected to the take-up motor 851. The guide rod 86 is installed between the take-up roller 87 and the traction wheel 85. The guide rod 86 is provided with several dividing rods 861.

[0040] The nascent filaments are interlaced between the guide rollers 82 and 83. Due to the difference in height between the two rollers, the nascent filaments are tensioned and guided. Then, guided by the guide ring 84, they enter the traction rollers 85. The traction motor 811 drives the two traction rollers 85 to rotate, and the speed difference achieves drafting. The drafted filaments are sorted by the separators 861 of the guide rod 86, and the winding motor 851 drives the winding roller 87 to complete the winding. The drafting and winding assembly improves the mechanical properties of the filaments through multi-stage guidance and traction speed difference, and the winding is neat and convenient for subsequent processing. Example 2

[0041] Please see Figure 9 as well as Figure 14 The difference between Embodiment 2 and Embodiment 1 is that a detection and control component 9 is added to the filter spinneret assembly 7 and the drawing and winding assembly 8. The detection and control component 9 includes a pressure sensor 91, a flow sensor 92, a viscosity sensor 93 and a tension sensor 94. The pressure sensor 91 is bolted to one side of the top feed pipe 72 and extends into it. The flow sensor 92 is located between the bottom feed pipes 73. The viscosity sensor 93 is installed at the bottom end of the bottom feed pipe 73 and extends into it. The tension sensor 94 is welded to the back plate 81 and located between the traction wheels 85.

[0042] When online monitoring of the production process is required to improve product quality, the pressure sensor 91 in the added detection and control component 9 monitors the pressure changes between the melt filter mechanism and the spinneret assembly in real time. When the pressure rises sharply, it can indicate filter blockage or abnormal melt viscosity, and the airtight door 712 can be opened for troubleshooting. When the pressure drops sharply, it can indicate melt leakage or feeding interruption, avoiding spinneret interruption or filament forming defects. The flow sensor 92 can accurately measure the melt delivery flow rate, avoiding flow fluctuations that cause inconsistent filament output from the spinneret orifice, which in turn leads to deviations in filament linear density. After receiving the signal, the control console 2 can fine-tune the twin screw speed to ensure that the melt output flow rate matches the requirements of the spinneret assembly.

[0043] Viscosity sensor 93 uses an online capillary method to detect melt viscosity in real time. An abnormally high viscosity usually corresponds to flame retardant agglomeration or excessively low melt temperature, while an abnormally low viscosity may be due to excessive flame retardant or excessively high temperature. Control console 2 adjusts the viscosity by regulating the twin-screw speed and barrel heating temperature, and simultaneously adjusts the flame retardant feed rate by regulating the servo motor 35 speed, thereby restoring the viscosity to a normal value. Tension sensor 94 can detect the tension state of the wound filament and provide real-time feedback to control console 2. Control console 2 maintains stable tension by regulating the speed of traction motor 811, preventing excessive tension from causing filament breakage or insufficient tension from causing filament slippage, ensuring uniform orientation of macromolecular chains during drawing, and improving the stability of filament mechanical properties. The detection and control components collect melt and filament parameters in real time, and control console 2 adjusts process parameters in conjunction, replacing traditional manual offline detection, reducing the batch production of defective products, and improving production efficiency.

[0044] The specific usage and function of this embodiment are as follows: In use, the operator first uses the inclined ladder 11 to climb to the top of the feeding cylinder 31, puts the nylon 6 chips into the nylon 6 chip feeding cylinder 31, filters impurities through the screen 311, and enters the mixing cylinder 48 through the pipe 32, and adds flame retardant powder into the flame retardant powder feeding cylinder 33.

[0045] The screw motor 41 and heating cylinder 61 are started. The screw motor 41 drives the main screw 42, which drives the auxiliary screw 43 to rotate synchronously through the gear 44. The spiral pusher plate 45 pushes the material forward, and the high shear block 46 performs strong shearing and dispersion on the material. The radial through holes 471 of the dispersion mixing plate 47 can enhance the convective mixing of the melt. The control console 2 controls the temperature of the heating shell 611 through the electrical control box 63 to heat and melt the material in the mixing cylinder 48 to form a uniform melt. The heat dissipation holes 62 on the heating shell 611 are used to enhance heat dissipation efficiency and are suitable for the enclosed heating scenario of cylindrical heating equipment. The servo motor 35 is started to drive the metering screw 36 through the motor shaft 351 to accurately control the feeding amount of flame retardant powder and synchronously deliver it to the mixing cylinder 48 to mix with the molten nylon 6 chips. This can avoid fluctuations in the concentration of flame retardant powder and improve the stability of flame retardant performance.

[0046] The melt enters the secondary mixing component 5. The extrusion motor 56 drives the sun extrusion gear 52 to rotate via the reducer 55. The planetary extrusion gear 53 rotates with the sun gear and engages with the serrations 511 of the gear cylinder 51 to perform secondary shearing and dispersion of the melt. Finally, it is discharged through the discharge cylinder 57. The two-stage mixing process, which combines the staggered shearing of the twin screws and the meshing shearing of the planetary gears, replaces the traditional single-stage structure, extends the mixing path, enhances the shearing field, and solves the problems of flame retardant agglomeration and uneven mixing.

[0047] The melt enters the filter box 71 through the top feed pipe 72, and after impurities are filtered by the filter plate 74, it is conveyed to the spinneret 75 through the bottom feed pipe 73 and sprayed out to form nascent nylon 6 filaments. The filter plate 74 filters impurities to prevent the spinneret holes from clogging.

[0048] The nascent filaments are interlaced between the guide rollers 82 and 83. Due to the difference in height between the two rollers, the nascent filaments are tensioned and guided. Then, guided by the guide ring 84, they enter the traction rollers 85. The traction motor 811 drives the two traction rollers 85 to rotate, and the speed difference achieves drafting. The drafted filaments are sorted by the separators 861 of the guide rod 86, and the winding motor 851 drives the winding roller 87 to complete the winding. The drafting and winding assembly improves the mechanical properties of the filaments through multi-stage guidance and traction speed difference, and the winding is neat and convenient for subsequent processing.

[0049] When online monitoring of the production process is required to improve product quality, a detection and control component 9 is added to the filter spinneret assembly 7 and the drawing and winding assembly 8. The pressure sensor 91 monitors the pressure changes between the melt filter mechanism and the spinneret assembly in real time. When the pressure rises sharply, it can indicate filter blockage or abnormal melt viscosity, and the airtight door 712 can be opened for troubleshooting. When the pressure drops sharply, it can indicate melt leakage or feeding interruption, thus preventing spinneret interruption or filament forming defects. The flow sensor 92 can accurately measure the melt delivery flow rate, avoiding flow fluctuations that cause inconsistent filament output from the spinneret orifice, which in turn leads to deviations in filament linear density. After receiving the signal, the control console 2 can fine-tune the twin screw speed to ensure that the melt output flow rate matches the requirements of the spinneret assembly.

[0050] Viscosity sensor 93 uses an online capillary method to detect melt viscosity in real time. An abnormally high viscosity usually corresponds to flame retardant agglomeration or excessively low melt temperature, while an abnormally low viscosity may be due to excessive flame retardant or excessively high temperature. Control console 2 adjusts the viscosity by regulating the twin-screw speed and barrel heating temperature, and simultaneously adjusts the flame retardant feed rate by regulating the servo motor 35 speed, thereby restoring the viscosity to a normal value. Tension sensor 94 can detect the tension state of the wound filament and provide real-time feedback to control console 2. Control console 2 maintains stable tension by regulating the speed of traction motor 811, preventing excessive tension from causing filament breakage or insufficient tension from causing filament slippage, ensuring uniform orientation of macromolecular chains during drawing, and improving the stability of filament mechanical properties. The detection and control components collect melt and filament parameters in real time, and control console 2 adjusts process parameters in conjunction, replacing traditional manual offline detection, reducing the batch production of defective products, and improving production efficiency.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production apparatus for flame-retardant and anti-drip nylon 6 filament, comprising a production platform (1) and a control console (2) disposed on the production platform (1), characterized in that: It also includes a feeding assembly (3), which includes a nylon 6 chip feeding cylinder (31), a primary mixing assembly (4) is provided below the nylon 6 chip feeding cylinder (31), a secondary mixing assembly (5) is connected to the tail end of the primary mixing assembly (4), a melting assembly (6) is nested outside the primary mixing assembly (4), a filter spinning assembly (7) is connected below the secondary mixing assembly (5), and a drawing and winding assembly (8) is provided below the filter spinning assembly (7). An inclined ladder (11) is installed on the production platform (1), and the inclined ladder (11) is welded to one side of the nylon 6 chip feeding cylinder (31); The primary mixing component (4) includes a screw motor (41), a main screw (42), a secondary screw (43), a gear (44), a spiral pusher plate (45), a high-shear block (46), a dispersion mixing plate (47), and a mixing cylinder (48). The gear (44) is welded to one end of the main screw (42) and the secondary screw (43) and meshes with each other. The main screw (42) is connected to one end of the screw motor (41). The spiral pusher plate (45) is nested and welded to the outside of the main screw (42) and the secondary screw (43) and is staggered and abuts against each other. The secondary mixing component (5) includes a gear cylinder (51), a solar extrusion gear (52), a planetary extrusion gear (53), a central shaft (54), a reducer (55), an extrusion motor (56), and a feed cylinder (57). The inner side of the gear cylinder (51) is provided with serrations (511). The planetary extrusion gear (53) and the solar extrusion gear (52) are symmetrically arranged and mesh with each other. A straight shaft (531) is welded between the symmetrically arranged planetary extrusion gears (53).

2. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 1, characterized in that: The central shaft (54) is welded with solar extrusion gears (52) at both ends. One end of the extrusion motor (56) is connected to the reducer (55). One end of the reducer (55) is connected to the solar extrusion gear (52). The feed cylinder (57) is fixed between the reducer (55) and the gear cylinder (51) by bolts. The planetary extrusion gear (53) meshes with the saw teeth (511) and rotates. The two ends of the gear cylinder (51) are fixed with screws and connected to the mixing cylinder (48) and the feed cylinder (57).

3. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 1, characterized in that: The outer side of the spiral pusher plate (45) abuts against the inner wall of the mixing cylinder (48), and the high shear block (46) is provided with several and symmetrically welded to the main screw (42) and the auxiliary screw (43). A dispersion mixing plate (47) is provided on one side of the symmetrically arranged high shear block (46), and several radial through holes (471) are provided on the dispersion mixing plate (47). The high shear block (46) and the dispersion mixing plate (47) are arranged alternately.

4. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 1, characterized in that: A screen (311) is provided inside the nylon 6 chip feeding cylinder (31). The bottom end of the nylon 6 chip feeding cylinder (31) is connected to a pipe (32) through a flange. The bottom end of the pipe (32) is connected to a mixing cylinder (48). A flame retardant powder feeding cylinder (33) is provided on one side of the nylon 6 chip feeding cylinder (31). A support plate (34) is fixed to the top of the flame retardant powder feeding cylinder (33) by screws. A servo motor (35) is fixed on the support plate (34).

5. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 4, characterized in that: One end of the servo motor (35) is connected to the motor shaft (351), and a metering screw (36) is welded to the bottom end of the motor shaft (351). The bottom of the flame retardant powder feeding cylinder (33) is connected to the mixing cylinder (48) through a flange.

6. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 5, characterized in that: The melting component (6) includes a heating cylinder (61), which is composed of a heating shell (611) arranged symmetrically on the upper and lower sides. The two are fastened together by bolts at both ends. The outer side of the heating cylinder (61) is provided with several heat dissipation holes (62). The inner side of the heating cylinder (61) is attached to the outer wall of the mixing cylinder (48). An electrical control box (63) is provided on the outer side of the heating shell (611). The electrical control box (63) is electrically connected to the control console (2).

7. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 1, characterized in that: The filter spinneret assembly (7) includes a filter box (71), a top feed pipe (72), a bottom feed pipe (73), a filter plate (74), and a spinneret plate (75). The top feed pipe (72) is welded between the feed cylinder (57) and the filter box (71). The filter box (71) has a groove (711). The filter plate (74) fits into the groove (711) and slides. A sealed door (712) is provided on one side of the groove (711). The bottom feed pipe (73) connects to the bottom of the groove (711). The spinneret plate (75) is fixed to the bottom end of the bottom feed pipe (73) by screws.

8. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 1, characterized in that: The drawing and winding assembly (8) includes a back plate (81), a guide wheel (82), a guide roller (83), a guide ring (84), a traction wheel (85), a guide rod (86), and a winding roller (87). The guide wheel (82) and the guide roller (83) are staggered, and the drawing height of the guide wheel (82) relative to the back plate (81) is higher than that of the guide roller (83). The two ends of the guide wheel (82) are fitted into the back plate (81) and rotated to engage. The guide ring (84) is located below the guide roller (83).

9. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 8, characterized in that: Two traction wheels (85) are arranged at an angle, one end of which passes through the back plate (81) and is connected to the traction motor (811). The traction motor (811) is fixed to the back plate (81) by screws. The take-up roller (87) is located below the traction wheel (85) and one end is connected to the take-up motor (851). The guide rod (86) is installed between the take-up roller (87) and the traction wheel (85). The guide rod (86) is provided with several partition rods (861).

10. The production apparatus for flame-retardant and anti-drip nylon 6 filament according to claim 9, characterized in that: The filter spinneret assembly (7) and the drawing and winding assembly (8) are provided with a detection and control assembly (9). The detection and control assembly (9) includes a pressure sensor (91), a flow sensor (92), a viscosity sensor (93), and a tension sensor (94). The pressure sensor (91) is bolted to one side of the top feed pipe (72) and extends into it. The flow sensor (92) is located between the bottom feed pipes (73). The viscosity sensor (93) is installed at the bottom end of the bottom feed pipe (73) and extends into it. The tension sensor (94) is welded to the back plate (81) and located between the traction wheels (85).

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