Adjustable preparation method of nylon-6 silk yarn with high evenness

Abstract

The invention discloses an adjustable preparation method of nylon-6 silk yarn with high evenness in the technical field of special yarn spinning, which comprises a spinning system, silk yarn of different raw materials can be blended and uniformly mixed through the spinning system, and the silk yarn with different characteristics can be spun through the process equipment and method, so that the production efficiency is improved, and the production cost is reduced. Meanwhile, various special-shaped silk threads can be rapidly cooled through circular blowing, lateral blowing is slow and uniform, vertical blowing is high in speed, the silk threads can be rapidly condensed and cured, meanwhile, in the spinning process, different master batch raw materials are conveniently added, the proportion of the master batch raw materials to slices is adjusted, and the spinning quality is improved. In the whole spinning process, the cooling effect of the device is more suitable for the silk threads added with inorganic raw materials, the situation that the silk threads are even in line dryness and even in dyeing can be effectively improved, and the device can be more suitable for the shaping effect of the silk threads added with the inorganic materials through cooperation of the silk drawing roller, the shaping roller and the tensioning roller.

Description

Technical Field

[0001] This invention relates to the field of specialty yarn textile technology, and in particular to an adjustable method for preparing nylon 6 yarn with high evenness. Background Technology

[0002] Nylon 6 functional yarn has always been a highly regarded product in the industry. It not only possesses the moisture absorption and abrasion resistance of nylon 6 fiber, but also the functions of added masterbatches, such as UV protection, cooling properties, and collagen. With the gradual rise in temperature in recent years, cooling nylon 6 fiber has received much attention. Its main additives are inorganic materials such as mica and jade powder. Through its high thermal conductivity, it can quickly absorb heat from the body surface and dissipate it into the environment, producing a cooling sensation. Its fabrics are not only used for summer clothing, but also for bedding, such as cooling sheets and duvet covers, which are mostly used by people in subtropical regions.

[0003] Conventional cooling nylon 6 fibers, due to the addition of inorganic substances, can only produce coarse denier and low-pore fibers. The fabrics made from these fibers have a relatively rough hand feel and a small fiber surface area, which limits their cooling effect. In recent years, the market has increasingly demanded higher performance from cooling nylon 6 fabrics. The fabrics not only need to have excellent cooling effect, but also need to have a more delicate and soft hand feel. These requirements have led to an increase in the number of pores inside the cooling nylon 6 fibers. However, the increased porosity and finer denier of the fibers pose significant challenges to the spinnability and other physical properties of the products.

[0004] The addition of these inorganic materials results in thinner and finer yarns, making them prone to tangling and breakage when exposed to side airflow. Furthermore, these inorganic yarns experience greater friction during spinning, leading to increased wear and tear, all of which negatively impact the product.

[0005] There is another type of yarn called "fat-thin yarn," which consists of alternating thick and thin sections. This type of yarn is difficult to spin, the raw materials are hard to supply, and it is prone to breakage. Moreover, the most difficult part of spinning this type of yarn is cooling and web formation. Conventional methods and processes do not produce good spinning results.

[0006] Based on this, the present invention designs an adjustable preparation method for nylon 6 yarn with high evenness to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide an adjustable method for preparing nylon 6 yarn with high evenness. This method and equipment can be used to spin yarns with different properties, while increasing their lubricity. The ring-blowing system can rapidly cool various irregularly shaped yarns, with slow and uniform lateral blowing and fast vertical blowing for faster condensation and solidification. Furthermore, the ratio of different masterbatch materials to chips can be adjusted by conveniently adding them during the spinning process, thereby obtaining yarns with different properties. The cooling effect of this device is more suitable for yarns with added inorganic materials, and it can also effectively improve yarn evenness and dyeing uniformity. The combination of the drawing roller, setting roller, and tension roller is more suitable for the setting effect of yarns with added inorganic materials.

[0008] This invention is achieved as follows: an adjustable method for preparing nylon 6 yarn with high evenness, comprising: The spinning system includes a chip hopper, a masterbatch hopper, a screw extruder, a spinning assembly, an annular blower, a drawing roller, a setting roller, a tensioning roller, and a winding machine; Both the chip hopper and the masterbatch hopper are temporary storage hoppers for spinning raw materials. After the chip hopper and the masterbatch hopper are combined, they are connected to the masterbatch machine through the same pipeline. The inlet of the screw extruder is connected to the outlet of the masterbatch mill, and the rear end of the screw extruder is also connected to an agitator. The rear end of the agitator is connected to multiple metering pumps, which are arranged in parallel. A spinning assembly is installed at the rear end of each metering pump, and an annular blower box is provided below the spinning assembly; Multiple cold air channels are vertically opened inside the annular blower box, and each cold air channel vertically penetrates the upper and lower surfaces of the annular blower box; a cold air channel is set directly below each spinning assembly. The annular blower box is also equipped with a horizontal air inlet chamber, which is a closed hollow cavity. The air inlet chamber is connected to each cold air duct, and the air inlet of the cold air duct is connected to the cold air supply duct through a pipe. A turbulence mesh is installed at the connection between the air inlet cavity and each cold air duct, and the turbulence mesh isolates the airflow path between the air inlet cavity and the cold air duct. Below the ring blower box, an oiler and a pre-networker are also provided. The yarn ejected from the spinning assembly passes through the cold air duct, and the yarn below the cold air duct passes through the oiler and the pre-networker in sequence from the upper right to the lower left. The drawing roller is a traction roller for the filament. The drawing roller is located at the rear end of the pre-networker. There are two drawing rollers, and the filament at the rear end of the pre-networker is tensioned and wound on the two drawing rollers. Furthermore, two shaping rollers are provided at the rear end of the drawing roller. The shaping rollers are high-temperature stainless steel rollers. Tensioning rollers are also provided at the rear end of the shaping rollers. A main network device is also provided between the drawing roller and the shaping roller. A winding machine is provided at the rear end of the tensioning roller; The spinning process includes the following steps: Step S1: Nylon 6 chips are fed into the chip hopper, and masterbatch is fed into the masterbatch hopper. The combined raw materials in the chip hopper and masterbatch hopper are fed into the masterbatch machine in proportion. In step S2, the masterbatch machine mixes, stirs, and weighs the masterbatch and chips, and then pushes them together into the screw extruder. The chips and masterbatch are fully melted and heated in the screw extruder to form a melt. The screw extruder continuously pushes the melt raw material backward. Step S3: The raw material enters the agitator and is stirred evenly by the agitator before entering the metering pump. The metering pump pumps the raw material into the spinning assembly, and the metering pump pumps the amount of raw material into the spinning assembly at a fixed frequency. In step S4, the high-temperature molten raw material is extruded into the spinning assembly to form a high-temperature filament. The filament is ejected from the lower end of the spinning assembly and travels downward through the vertical cold air duct inside the annular blower box. Step S5: The wire passing through the cold air duct is blown into the air inlet cavity by the cold air and forms an upward cooling airflow, which rapidly cools the high-temperature wire into a solid wire. The airflow in the air inlet cavity is buffered and dispersed by the turbulence net and then enters the cold air duct, forming a stable wind pressure that flows vertically upward. Step S6: The yarn passing downward through the cold air duct first passes through the oiler, through which the oil is evenly dispersed in the yarn fibers, and then the yarn is pre-networked by the pre-networker to blow air to initially increase the network points. Step S7: The subsequent yarns are wound and pulled sequentially through two drawing rollers and two shaping rollers. The winding speeds of the drawing rollers and shaping rollers are not the same. The speed of the shaping rollers is greater than that of the drawing rollers. The drawing rollers are wound at room temperature, while the shaping rollers are wound and pulled at high temperature. In step S8, the filaments pulled out from the rear end of the shaping roller are blown by the main networker to increase the network points, and finally wound into shape by the winding machine.

[0009] Furthermore, the airflow deflector is connected to the blower box via a bracket, and the multiple airflow deflectors are spaced apart from each other, with the interval between each airflow deflector being between 1 and 2 cm.

[0010] Furthermore, the drawing roller is at room temperature; The winding speed of the drawing roller is below 4300m / min; The temperature of the shaping roller is between 120℃ and 190℃; the winding speed of the shaping roller is above 4600m / min.

[0011] Furthermore, the stirrer is a dynamic stirrer.

[0012] Furthermore, the metering pump is a oscillating hydraulic pump capable of metering; the main frequency of the metering pump is 21.6Hz; the oscillation frequency of the metering pump is 6.2Hz; and the oscillation time of each oscillation of the metering pump is 0.01s.

[0013] The beneficial effects of this invention are as follows: 1. This invention increases the simultaneous feeding of masterbatch hopper and chip hopper, and through the stirring of the masterbatch machine, the solid granular raw materials can be uniformly mixed. Furthermore, a dynamic stirrer is added at the rear end of the screw extruder, which can make the melt and masterbatch mix evenly during the conveying process, improve the dispersibility of the masterbatch, ensure the uniformity of fiber dyeing, and enable the inorganic additives of the masterbatch such as yarn to be mixed more evenly with the chips, ensuring the uniformity of the raw materials. Through the dynamic mixing of masterbatch hopper and chip hopper, different yarns can be quickly switched, and different proportions of yarns can be adjusted in real time, making the spinning process more flexible and convenient. 2. A cold air duct with a baffle net has been added, and the production process of producing porous fine denier nylon 6 has been changed to ring blowing. The horizontal blowing is blocked by the baffle net, which slows down the cross-cutting air, while the vertical airflow is straight. When the air intake at the top is increased, the vertical blowing is faster and can remove more heat more quickly, solving the problem of uniform air output of traditional side blowing. At the same time, a uniform cooling field is formed. During the uniform cooling process of the nascent fiber, the core-sheath structure is reduced, the fiber uniformity is improved, and the fiber evenness and dyeing problems are also improved. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the overall process equipment connection structure of the present invention; Figure 2 This is a top view of the ring-shaped air box of the present invention; Figure 3 This is a schematic diagram showing the front of the turbulence mesh blocking the air inlet cavity in this invention. Figure 4 This is a schematic diagram of the unobstructed air inlet cavity structure of the present invention.

[0016] The attached diagram lists the components represented by each number as follows: 1-Slice hopper, 11-Masterbatch hopper, 12-Masterbatch mill, 2-Screw extruder, 21-Agitator, 22-Metering pump, 3-Spinning assembly, 31-Oiler, 32-Pre-networker, 33-Main networker, 4-Annular blower box, 41-Cold air duct, 42-Break screen, 43-Air inlet chamber, 5-Drawing roller, 51-Setting roller, 52-Tensioning roller, 6-Winding machine. Detailed Implementation

[0017] Please see Figures 1 to 4 As shown, the present invention provides an adjustable preparation method for nylon 6 yarn with high evenness. In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] In a specific embodiment of the technical solution of the present invention: The spinning system includes a chip hopper 1, a masterbatch hopper 11, a screw extruder 2, a spinning assembly 3, an annular blower box 4, a drawing roller 5, a setting roller 51, a tensioning roller 52, and a winding machine 6; Both the chip hopper 1 and the masterbatch hopper 11 are temporary storage hoppers for spinning raw materials. After the chip hopper 1 and the masterbatch hopper 11 are combined, they are connected to the masterbatch machine 12 through the same pipeline. The inlet of the screw extruder 2 is connected to the outlet of the masterbatch mill 12. The rear end of the screw extruder 2 is also connected to an agitator 21. The rear end of the agitator 21 is connected to multiple metering pumps 22, which are connected in parallel. Each metering pump 22 is equipped with a spinning assembly 3 at its rear end, and a ring blower box 4 is set below the spinning assembly 3; Multiple cold air ducts 41 are vertically opened inside the annular blower box 4, and each cold air duct 41 vertically penetrates the upper and lower surfaces of the annular blower box 4; a cold air duct 41 is set directly below each spinning assembly 3. The ring blower box 4 is also equipped with a horizontal air inlet chamber 43. The air inlet chamber 43 is a closed hollow cavity. The air inlet chamber 43 is connected to each cold air duct 41. The air inlet of the cold air duct 41 is connected to the cold air supply duct through a pipe. A turbulence net 42 is provided at the connection between the air inlet cavity 43 and each cold air duct 41. The turbulence net 42 isolates the airflow path between the air inlet cavity 43 and the cold air duct 41. Below the ring blower box 4, an oiler 31 and a pre-networker 32 are also provided. The yarn ejected from the spinning assembly 3 passes through the cold air duct 41, and the yarn below the cold air duct 41 passes through the oiler 31 and the pre-networker 32 from the upper right to the lower left. The drawing roller 5 is a traction roller for the filament. The drawing roller 5 is located at the rear end of the pre-networker 32. There are two drawing rollers 5, and the filament at the rear end of the pre-networker 32 is tensioned and wound on the two drawing rollers 5. Furthermore, two shaping rollers 51 are provided at the rear end of the drawing roller 5. The shaping rollers 51 are high-temperature stainless steel rollers. Tensioning rollers 52 are also provided at the rear end of the shaping rollers 51. A main network device 33 is also provided between the drawing roller 5 and the shaping rollers 51. A winding machine 6 is installed at the rear end of the tensioning roller 52; The spinning process includes the following steps: Step 1: Nylon 6 chips are fed into chip hopper 1, and masterbatch is fed into masterbatch hopper 11. The combined raw materials in chip hopper 1 and masterbatch hopper 11 are fed into masterbatch machine 12 in proportion. Step 2: The masterbatch machine 12 mixes, stirs, and weighs the masterbatch and chips, and then pushes them into the screw extruder 2. The chips and masterbatch are fully melted and heated in the screw extruder 2 to form a melt. The screw extruder 2 continuously pushes the melt raw material backward. Step 3: The raw material enters the agitator 21. The agitator 21 is a dynamic agitator that can continuously stir in real time and can also continue to deliver molten raw material.

[0019] After being thoroughly mixed by the agitator 21, the material enters the metering pump 22, which pumps the raw material into the spinning assembly 3. The metering pump 22 is a metering oscillating hydraulic pump; the main frequency of the metering pump 22 is 21.6Hz; the oscillation frequency of the metering pump 22 is 6.2Hz; the oscillation time of each oscillation of the metering pump 22 is 0.01s; the regular oscillation of the metering pump causes the yarn to form thick and thin yarns, that is, a section of yarn is thick and a section of yarn is thin, and they are set alternately to form a regular thick and thin yarn.

[0020] Step 4: The high-temperature molten raw material is squeezed into the spinning assembly 3 to form a high-temperature filament. The filament is ejected from the lower end of the spinning assembly 3 and travels downward through the vertical cold air duct 41 inside the annular blower box 4. Step 5: The wire passing through the cold air duct 41 is blown into the air inlet cavity 43 by the cold air, forming an upward cooling airflow. This rapidly cools the high-temperature wire into a solid wire. The airflow in the air inlet cavity 43 is buffered and dispersed by the baffle net 42 before entering the cold air duct 41, forming a stable vertical upward air pressure. Because there is no lateral side blowing, the lateral airflow is uniform and stable. The vertical airflow speed in the cold air duct 41 is fast. Instead, the heat of the wire is quickly carried away by the vertical airflow, allowing the wire to cool and solidify evenly. The baffle net 42 is connected to the blower box 4 via a bracket. Multiple baffle nets 42 are spaced apart from each other, with a spacing of 1-2 cm between each baffle net 42. This structure allows the baffle net 42 to block strong airflow while allowing airflow to flow quickly into the cold air duct 41 through the gaps between the baffle nets 42, thereby reducing strong airflow and providing sufficient cold air volume.

[0021] Step 6: The yarn passing down through the cold air duct 41 first passes through the oiler 31, where the oil is evenly dispersed in the yarn fibers. Then, the yarn passes through the pre-networker 32 to blow air onto it to initially increase the network points. Step 7: The subsequent threads are wound and pulled sequentially through two drawing rollers 5 and two shaping rollers 51. The winding speeds of the drawing rollers 5 and the shaping rollers 51 are not the same, with the shaping rollers 51 having a higher speed than the drawing rollers 5. The drawing rollers 5 are at room temperature. The winding speed of the wire drawing roller 5 is below 4300 m / min; The shaping roller 51 is a high-temperature winding traction roller; The temperature of the setting roller 51 is between 120℃ and 190℃; the winding speed of the setting roller 51 is above 4600m / min. The fibers are drawn into the winding machine 6 by the guide disc for winding and forming, producing porous fine denier nylon 6 fibers. Step 8: The filaments pulled out from the rear end of the shaping roller 51 are blown by the main networker 33 to increase the network points, and finally wound into shape by the winding machine 6.

[0022] It should be noted that: 1. This device can add different types of masterbatch raw materials to the masterbatch bin 11 according to different needs, and then mix them through the masterbatch machine 12. It can also feed and mix the sliced ​​material bin 1 and the masterbatch bin 11 according to the set ratio. The entire mixing process is automated. Moreover, this production process not only mixes solid granular raw materials, but also mixes molten raw materials again through the dynamic stirrer 21, making the mixing more complete and ensuring complete mixing of raw materials. 2. By adjusting the frequency and continuously changing the pressure of the metering pump 22, the yarn spun by the spinning assembly is formed into thick and thin yarns. The thickness of these thick and thin yarns varies intermittently, resulting in uneven yarn thickness and varying heat content. This is especially true for thick and thin yarns with irregular cross-sections, where the heat content is even more uneven. Therefore, side-blowing air cannot meet the requirements of this abnormal heat release pattern. While conventional ring-blowing air can cool fine denier yarns, it cannot adapt to the constantly changing thickness of the yarns. This device uses a baffle net 42 to slow down the lateral airflow, and the baffle net 42 is also spaced out to form... The gap allows for faster introduction of cold air into the cold air duct 41, ensuring sufficient cold air volume within the duct and creating a high-speed vertical airflow. As long as the intake volume is large, the cold air supply volume is also large. Furthermore, this high-pressure cooling method does not generate a larger crosswind; the larger airflow is concentrated within the vertical cold air duct 41, without affecting the alternating thickness of the yarn or its overall uniformity. This process provides better spinning results for yarns with added organic materials, whether fine denier or thick / thin yarns, and also better ensures the yarn's evenness.

[0023] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for preparing nylon 6 yarn with high evenness, characterized in that, include: The spinning system includes a chip hopper (1), a masterbatch hopper (11), a screw extruder (2), a spinning assembly (3), an annular blower box (4), a drawing roller (5), a setting roller (51), a tensioning roller (52), and a winding machine (6). The chip hopper (1) and the masterbatch hopper (11) are both temporary storage hoppers for spinning raw materials. The chip hopper (1) and the masterbatch hopper (11) are connected to the masterbatch machine (12) through the same pipeline after they are combined. The inlet of the screw extruder (2) is connected to the outlet of the masterbatch mill (12). The rear end of the screw extruder (2) is also connected to an agitator (21). The rear end of the agitator (21) is connected to multiple metering pumps (22), which are arranged in parallel. Each metering pump (22) is equipped with a spinning assembly (3) at its rear end, and a ring blower box (4) is provided below the spinning assembly (3). Multiple cold air ducts (41) are vertically opened inside the ring blower box (4), and each cold air duct (41) vertically penetrates the upper and lower surfaces of the ring blower box (4); a cold air duct (41) is set directly below each spinning assembly (3). The ring blower box (4) is also provided with a horizontal air inlet cavity (43). The air inlet cavity (43) is a closed hollow cavity. The air inlet cavity (43) is connected to each cold air duct (41). The air inlet of the cold air duct (41) is connected to the cold air supply duct through a pipe. A turbulence net (42) is provided at the connection between the air inlet cavity (43) and each cold air duct (41), and the turbulence net (42) is isolated on the airflow path of the air inlet cavity (43) and the cold air duct (41); Below the ring blower box (4), an oiler (31) and a pre-networker (32) are also provided. The yarn ejected by the spinning assembly (3) passes through the cold air duct (41), and the yarn below the cold air duct (41) passes through the oiler (31) and the pre-networker (32) from the upper right to the lower left. The drawing roller (5) is a traction roller for the filament. The drawing roller (5) is located at the rear end of the pre-networker (32). There are two drawing rollers (5), and the filament at the rear end of the pre-networker (32) is tensioned and wound on the two drawing rollers (5). Furthermore, two shaping rollers (51) are provided at the rear end of the drawing roller (5). The shaping rollers (51) are high-temperature stainless steel rollers. Tensioning rollers (52) are also provided at the rear end of the shaping rollers (51). A main network device (33) is also provided between the drawing roller (5) and the shaping rollers (51). A winding machine (6) is provided at the rear end of the tensioning roller (52). The spinning process includes the following steps: Step S1: Nylon 6 chips are fed into the chip hopper (1), and masterbatch is fed into the masterbatch hopper (11). The combined raw materials in the chip hopper (1) and the masterbatch hopper (11) are fed into the masterbatch machine (12) in proportion. In step S2, the masterbatch machine (12) mixes, stirs, weighs, and then pushes the masterbatch and chips into the screw extruder (2). The chips and masterbatch are fully melted and heated in the screw extruder (2) to form a melt. The screw extruder (2) continuously pushes the melt raw material backward. In step S3, the raw material enters the stirrer (21) and is stirred evenly by the stirrer (21) before entering the metering pump (22). The metering pump (22) pumps the raw material into the spinning assembly (3) and the metering pump (22) pumps in a fixed frequency change principle. In step S4, the high-temperature molten raw material is squeezed into the spinning assembly (3) to form a high-temperature filament. The filament is ejected from the lower end of the spinning assembly (3) and travels downward through the vertical cold air duct (41) inside the ring blower box (4). Step S5: The wire passing through the cold air duct (41) is blown into the air inlet cavity (43) by the cold air and forms an upward cooling airflow, which cools the high temperature wire quickly to form a solid wire. The airflow in the air inlet cavity (43) is buffered and dispersed by the turbulence net (42) and then enters the cold air duct (41) to form a stable wind pressure flowing vertically upward. Step S6: The yarn passing down through the cold air duct (41) first passes through the oiler (31), and the oiler (31) evenly disperses the oil in the yarn fibers. Then, the yarn is blown with air by the pre-networker (32) to initially increase the network points. In step S7, the subsequent threads are wound and pulled sequentially through two drawing rollers (5) and two shaping rollers (51), and the winding speeds of the drawing rollers (5) and the shaping rollers (51) are inconsistent. The speed of the shaping rollers (51) is greater than that of the drawing rollers (5). The drawing rollers (5) are wound at room temperature, while the shaping rollers (51) are wound and pulled at high temperature. In step S8, the filaments pulled out from the rear end of the shaping roller (51) are blown by the main networker (33) to increase the network points, and finally wound into shape by the winding machine (6).

2. The adjustable preparation method for high uniformity nylon 6 yarn according to claim 1, characterized in that: The turbulence net (42) is connected to the blower box (4) via a bracket. The multiple turbulence nets (42) are separated from each other, and the interval between each turbulence net (42) is between 1-2 cm.

3. The adjustable preparation method for high uniformity nylon 6 yarn according to claim 1, characterized in that: The drawing roller (5) is at room temperature; The winding speed of the wire drawing roller (5) is below 4300m / min; The temperature of the shaping roller (51) is between 120°C and 190°C; the winding speed of the shaping roller (51) is above 4600 m / min.

4. The adjustable preparation method for high uniformity nylon 6 yarn according to claim 1, characterized in that: The stirrer (21) is a dynamic stirrer.

5. The adjustable preparation method for high uniformity nylon 6 yarn according to claim 1, characterized in that: The metering pump (22) is a metering oscillating hydraulic pump; the main frequency of the metering pump (22) is 21.6Hz; the oscillation frequency of the metering pump (22) is 6.2Hz; and the oscillation time of each oscillation of the metering pump (22) is 0.01s.

Images