Polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and spinning process

Abstract

The invention relates to the technical field of chemical fiber manufacturing, and discloses polyester filament semi-dull POY melt direct spinning imitation cotton spinning equipment and a spinning technology.The polyester filament semi-dull POY melt direct spinning imitation cotton spinning equipment comprises a bottom plate, a melt conveyor, a booster pump, a spinning machine, a cooling machine, a tension adjusting mechanism, an oil spraying box and a winding machine are sequentially arranged at the top of the bottom plate from left to right, and the tension adjusting mechanism comprises a rack; the bottom of the rack is fixedly connected to the top of the bottom plate, an induction part is arranged on the outer side of the rack, a transmission part is arranged on the outer side of the induction part, an adjusting part is arranged on the outer side of the rack, a conveying part is arranged at the output end of the adjusting part, the induction part comprises a main swing arm and an auxiliary swing arm, and one end of the main swing arm and one end of the auxiliary swing arm are rotationally connected to the outer side of the rack. According to the device, the beneficial effects of monitoring the spinning tension in real time and automatically adjusting the rotating speed of the discharging roller are achieved, it is ensured that the spinning conveying tension is stable, the situation that the fiber quality is affected due to abnormal tension is avoided, and the accuracy and automation degree of tension adjustment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical fiber manufacturing, in particular to polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and a spinning process. Background Art

[0002] In the production of polyester filament, the semi-matt POY melt-spinning process, which imparts cotton-like softness and comfort, has become a research hotspot in recent years. Tension control during the spinning process is crucial for fiber quality. Stable tension ensures uniform fiber thickness and a smooth surface, avoiding problems such as fiber breakage, loosening, and molding defects caused by abnormal tension. It is also crucial for subsequent oiling and winding processes.

[0003] Currently, traditional spinning equipment typically uses simple mechanical friction tensioners or feedback control systems based on a combination of sensors and motors to adjust tension. The former relies on manual adjustment of friction plate pressure, cannot dynamically respond to tension changes in real time, has low adjustment accuracy and significant hysteresis, and is difficult to adapt to the subtle fluctuations in tension during high-speed spinning. While the latter has certain automation functions, the sensors are easily interfered with by environmental factors, and the control system is complex and costly. Long-term operation may lead to signal delays or control errors, resulting in unstable spinning tension and affecting the consistency of fiber quality.

[0004] Therefore, in view of the above problems, a polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and spinning process are proposed to solve the above problems. Summary of the Invention

[0005] In order to make up for the above shortcomings, the present invention provides polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and spinning process, aiming to improve the problems in the existing technology that the tension adjustment method of traditional spinning equipment has low precision and is easily disturbed, resulting in insufficient tension stability, which affects the spinning quality.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] Polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment, including a bottom plate, the top of which is provided with a melt conveyor, a booster pump, a spinning machine, a cooler, a tension adjustment mechanism, an oil spray box and a winder from left to right;

[0008] The tension adjustment mechanism includes a frame, the bottom of the frame is fixedly connected to the top of the base plate, an induction member is provided on the outside of the frame, a transmission member is provided on the outside of the induction member, an adjustment member is provided on the outside of the frame, and a conveying member is provided at the output end of the adjustment member;

[0009] The induction component includes a main swing arm and a secondary swing arm, one end of the main swing arm and the secondary swing arm are both rotatably connected to the outside of the frame, and the rotating ends of the main swing arm and the secondary swing arm are fixedly connected to a rotating shaft, the outer sides of the rotating shafts of the main swing arm and the secondary swing arm are fixedly connected to synchronous gears, and the two synchronous gears are engaged with each other, the bottom of the main swing arm is rotatably connected to a feed roller, and movable grooves are provided on both sides of the main swing arm and the secondary swing arm;

[0010] As a further description of the above technical solution:

[0011] The transmission member includes a movable shaft, which is movably connected inside the movable groove, and the far ends of the two movable shafts are fixedly connected to the driving piles, a limit block is provided inside the movable groove, and the outer sides of the two driving piles are sleeved with a limit sleeve, and the outer sides of the proximal ends of the two driving piles are fixedly connected to the connecting piles, and the outer sides of the connecting piles are rotatably connected to the rotating rods, and the other ends of the two rotating rods are rotatably connected to the connecting rods, and the other ends of the connecting rods are rotatably connected to the transmission rods on both sides, and the other ends of the transmission rods are fixedly connected to the sliding column;

[0012] As a further description of the above technical solution:

[0013] The adjusting member includes a console, which is arranged on the inner side of the frame, and a motor is installed on the outside of the console, the output end of the motor is fixedly connected to a driving wheel, the outer side of the driving wheel is sleeved with a driven wheel, and the driving wheel and the driven wheel are connected by friction transmission, the inner side of the console is slidably connected to two brake pads, and the inner side shape of the brake pads is adapted to the outer side shape of the driven wheel, a limiting groove is provided on the outer side of one end of the console, and the other end of the sliding column passes through the limiting groove and is rotatably connected to the outer side of the brake pad;

[0014] As a further description of the above technical solution:

[0015] The conveying member includes two transmission gears, which are rotatably connected to the inner side of the frame and mesh with each other. The other sides of the two transmission gears are fixedly connected to a discharge roller 1 and a discharge roller 2 respectively, and the other end of the discharge roller 1 is fixedly connected to the outer center of the driven wheel;

[0016] As a further description of the above technical solution:

[0017] The melt conveyor includes a polyester melt storage tank, a melt filter, a melt distributor and a temperature controller. The polyester melt storage tank is arranged on the top of the bottom plate, the melt filter is arranged at the outlet of the polyester melt storage tank, the melt distributor is connected to the outlet of the melt filter, and the temperature controller is arranged outside the polyester melt storage tank. The polyester melt storage tank adopts a double-layer jacket structure, a conical guide port is provided at the bottom of the polyester melt storage tank, the melt distributor adopts a tree-like diversion structure, and the inner wall of the flow channel of the melt distributor is polished;

[0018] As a further description of the above technical solution:

[0019] The spinning machine includes a screw extruder, a spinneret, a metering pump and a spinning manifold, wherein the screw extruder is arranged on the top of the bottom plate, the spinneret is arranged at the outlet of the screw extruder, the spinning manifold is arranged at the outlet of the screw extruder and corresponds to the outlet of the spinneret, the metering pump is arranged outside the spinning manifold, the hole shape of the spinneret is designed to be trilobal, the opening arrangement of the spinneret adopts a staggered spiral distribution, and the inner wall of the spinning manifold is sprayed with an anti-stick coating;

[0020] As a further description of the above technical solution:

[0021] The cooler includes a side-blowing bellows and a ring-blowing bellows, both of which are arranged on the top of the base plate, and the side-blowing bellows are arranged at the front end of the ring-blowing bellows. The side-blowing bellows adopt a rectangular bellows structure, and the ring-blowing bellows adopts an annular honeycomb wind tube.

[0022] As a further description of the above technical solution:

[0023] The oil spray box includes an oil storage tank, a nozzle and an oiling roller. The oil storage tank is arranged on the top of the oil spray box, the nozzle is arranged on the inner top of the oil spray box, and the oiling roller is arranged inside the oil spray box. The oiling roller adopts a double-row porous roller, and the center of the oiling roller corresponds to the center of the nozzle outlet.

[0024] The polyester filament semi-dull POY melt direct spinning cotton-like spinning process is applicable to the above-mentioned polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment, comprising the following steps:

[0025] S1. Melt preparation and transportation: After the proportioned raw material slices are put into the melting device for melting, the melt is transported to the polyester melt storage tank by a pressure pump. The melt in the storage tank then enters the spinning machine through the melt filter and melt distributor;

[0026] S2, Spinning: The melt enters the spinning box, is accurately metered by the metering pump, and is extruded through the trilobal spinneret to form primary fibers;

[0027] S3, cooling and solidification: After the nascent fibers exit the spinneret, they first pass through a side-blowing device to be initially cooled to above the glass transition temperature to prevent adhesion. They then enter a ring-blowing device to be further cooled to room temperature to form fibers with a certain strength.

[0028] S4, Tension adjustment: The cooled spinning enters the tension adjustment device, passes through the feeding roller, and enters the subsequent spray box with the discharge roller. When the spinning tension is too high, the feeding roller is lifted up to drive the main swing arm and the auxiliary swing arm to rotate in opposite directions. Then, the two brake pads are driven by the transmission parts to move towards each other and contact the driven wheel driven by the motor, thereby reducing the speed of the driven wheel and the speed of the discharge roller. When the spinning tension is too low, the speed of the discharge roller is increased to stabilize the tension during the spinning and conveying process.

[0029] S5, oiling treatment: The cooled fiber passes through multiple oiling rollers, and the oil is evenly coated on the fiber surface through a nozzle;

[0030] S6. Winding: The oiled fiber is introduced into the winder through the yarn guide and wound into a yarn cake by the winding roller.

[0031] The present invention has the following beneficial effects:

[0032] 1. In the present invention, the main swing arm, the auxiliary swing arm and the synchronous gears meshing with each other on the outside of the rotating shaft drive the transmission structures such as the movable shaft, the driving pile, and the rotating rod, so that the sliding column pushes the brake pad and the driven wheel to act, thereby achieving the beneficial effects of real-time monitoring of the spinning tension and automatic adjustment of the speed of the discharge roller, ensuring the stability of the spinning conveying tension, avoiding the influence of abnormal tension on the fiber quality, and improving the accuracy and automation of the tension adjustment.

[0033] 2. In the present invention, the cotton-like nature of polyester fiber is achieved by orderly connecting the process structures such as melt preparation and transportation, spinning forming, cooling and solidification, tension adjustment, oiling treatment, and winding forming, thereby improving the softness and feel of the fiber. In addition, the stability and accuracy of the parameters are ensured by real-time monitoring of various process parameters in the spinning process, such as melt temperature, spinning speed, cooling conditions, oiling amount, and winding tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a three-dimensional schematic diagram of the polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and spinning process proposed by the present invention;

[0035] Figure 2 This is a process flow chart of the polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and spinning process proposed by the present invention;

[0036] Figure 3 This is a schematic structural diagram of the frame of the polyester filament semi-dull POY melt-spinning cotton-like spinning equipment and spinning process proposed in the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the induction components of the polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and the spinning process proposed by the present invention;

[0038] Figure 5 This is a schematic structural diagram of the conveying components of the polyester filament semi-dull POY melt-spinning cotton-like spinning equipment and spinning process proposed by the present invention;

[0039] Figure 6 This is a schematic diagram of the structure of the transmission parts of the polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and spinning process proposed by the present invention;

[0040] Figure 7 This is a schematic structural diagram of the regulating parts of the polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment and the spinning process proposed by the present invention;

[0041] Figure 8 for Figure 5 Enlarged view of point A in the middle.

[0042] Legend:

[0043] 1. Bottom plate; 2. Melt conveyor; 3. Booster pump; 4. Spinning machine; 5. Cooling machine; 6. Tension adjustment mechanism; 61. Frame; 62. Induction element; 621. Main swing arm; 622. Auxiliary swing arm; 623. Synchronous gear; 624. Feed roller; 625. Movable trough; 63. Transmission element; 631. Movable shaft; 632. Driving pile; 633. Limit block; 634. Connecting pile; 635 , rotating rod; 636, connecting rod; 637, transmission rod; 638, sliding column; 639, limiting sleeve; 64, adjusting part; 641, control console; 642, limiting groove; 643, motor; 644, driving wheel; 645, driven wheel; 646, brake pad; 65, conveying part; 651, discharge roller 1; 652, discharge roller 2; 653, transmission gear; 7, spray tank; 8, winding machine. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] Reference Figures 1 to 8 The present invention provides an embodiment of a semi-dull POY melt-spinning cotton-like spinning device for polyester filament, comprising a base plate 1. A melt conveyor 2, a booster pump 3, a spinning machine 4, a cooler 5, a tension adjustment mechanism 6, an oil spray tank 7, and a winder 8 are sequentially arranged on the top of the base plate 1 from left to right. The base plate 1 serves as the basic supporting structure of the device. Through stable support, it ensures that the various components maintain a precise relative position during operation, thereby ensuring the stable operation of the entire device.

[0046] The melt conveyor 2 includes a polyester melt storage tank, a melt filter, a melt distributor and a temperature controller. The polyester melt storage tank adopts a double-layer jacket structure, into which a temperature control medium can be introduced to effectively maintain the temperature stability of the melt in a molten state and avoid changes in the melt viscosity due to temperature fluctuations. The conical guide port provided at the bottom of the storage tank can use gravity to make the melt flow out smoothly and reduce residue; a multi-layer filter screen is provided inside the melt filter to accurately filter out mechanical impurities, unmelted particles, etc. that may exist in the melt, thereby ensuring the purity of the melt entering the subsequent process and avoiding impurities affecting the fiber molding quality; the melt distributor adopts a tree-like diversion structure, which can evenly distribute the melt in the main pipeline to multiple branch flow channels, ensuring that the melt flow rate of each flow channel is consistent, and the inner wall of the flow channel is polished to reduce the melt flow resistance and reduce the residence time of the melt in the flow channel; the temperature controller is linked to the polyester melt storage tank to monitor the melt temperature in the storage tank in real time, and accurately control the melt temperature within the process requirements by adjusting the flow rate or temperature of the temperature control medium in the jacket layer;

[0047] The spinning machine 4 includes a screw extruder, a spinneret, a metering pump and a spinning box. The screw extruder applies pressure to the melt through the rotation of the screw, pushing the melt toward the spinneret. At the same time, the shearing effect of the screw can further even out the viscosity of the melt. The metering pump adopts a high-precision gear pump or a plunger pump, which can accurately control the melt extrusion amount according to the set spinning speed, ensuring that the material supply amount of each fiber is consistent, providing a key guarantee for the uniform formation of the fiber. The hole shape of the spinneret is designed to be trilobal. This special cross-sectional shape enables the extruded melt to form primary fibers with a cotton-like fiber structure after cooling, thereby improving the softness and fluffiness of the fiber. The hole arrangement adopts a staggered spiral distribution, which can avoid the fibers extruded from adjacent channels from adhering to each other before cooling, and at the same time make the distribution of fibers on the spinneret surface more uniform, thereby improving the fiber forming quality. The inner wall of the spinning box is sprayed with an anti-stick coating. The coating adopts a high-temperature resistant, low-surface-energy material, which can effectively prevent the melt from condensing and adhering to the inner wall of the box, thereby ensuring the continuity of the spinning process.

[0048] The cooling machine 5 includes a side-blowing bellows and an annular-blowing bellows. The side-blowing bellows adopts a rectangular bellows structure with evenly distributed air holes inside. It can blow air with a constant wind speed and temperature to the nascent fibers, preliminarily cooling the fibers just extruded from the spinneret to above the glass transition temperature, forming a semi-solidified layer on the fiber surface to prevent the fibers from entangled and adhering to each other during movement; the annular-blowing bellows adopts an annular honeycomb-shaped air tube to provide uniform cooling airflow around the fibers, performing secondary cooling on the preliminarily cooled fibers, further reducing the fiber temperature to room temperature, completing the solidification process, and forming fibers with sufficient strength and rigidity to meet the requirements of subsequent tension adjustment and winding processes;

[0049] The oil spray box 7 includes an oil storage tank, a nozzle and an oiling roller. The oil storage tank is used to store the oil required for the spinning process. The oil has the functions of lubrication, antistatic and softening, and can meet the performance requirements of subsequent fiber processing; the nozzle adopts a high-pressure atomizing nozzle, which can evenly atomize the oil and spray it on the fiber surface to form a thin oil film; the oiling roller adopts a double-row porous roller. The porous structure on the roller surface can absorb the oil and evenly transfer it to the fiber. The center of the roller corresponds to the center of the nozzle outlet, ensuring that the oil can be accurately attached to the fiber when passing through, reducing oil waste, and making the oil more evenly distributed on the fiber surface, effectively reducing the friction between the fiber and the equipment, and preventing static electricity accumulation;

[0050] The tension adjustment mechanism 6 includes a frame 61, the bottom of which is connected to the top of the base plate 1 by bolts or other fixing means. It serves as the main frame of the tension adjustment mechanism 6. Its rigid structure provides a stable installation foundation for the internal sensing member 62, transmission member 63, adjustment member 64 and conveying member 65, ensuring that each component maintains a precise relative position during movement. The sensing member 62 is provided on the outside of the frame 61, the transmission member 63 is provided on the outside of the sensing member 62, the adjustment member 64 is provided on the outside of the frame 61, and the conveying member 65 is provided at the output end of the adjustment member 64.

[0051] The induction member 62 includes a main swing arm 621 and an auxiliary swing arm 622. One end of the main swing arm 621 and the auxiliary swing arm 622 are rotatably connected to the outer side of the frame 61 through bearings and can rotate flexibly around the rotating shaft. A synchronous gear 623 is installed on the outer side of the rotating shaft to which the rotating end is fixed. The two synchronous gears 623 are meshed with each other to ensure that the main swing arm 621 and the auxiliary swing arm 622 maintain reverse synchronous movement during rotation. The bottom of the main swing arm 621 is rotatably connected to the feed roller 624. The feed roller 624 is in direct contact with the spinning. When the spinning tension changes, the tension applied to the feed roller 624 will drive the main swing arm 621 to rotate around the rotating shaft, and the auxiliary swing arm 622 will rotate in the opposite direction under the action of the synchronous gear 623. The movable grooves 625 arranged on both sides of the main and auxiliary swing arms 622 provide a motion track for the movable shaft 631 in the transmission member 63, so that the movable shaft 631 can slide in the groove as the swing arm rotates;

[0052] The transmission member 63 includes a movable shaft 631, which is movably connected to the inside of the movable groove 625 and can slide along the length direction of the groove. A limit block 633 is provided inside the movable groove 625 to limit the range of motion of the movable shaft 631. The far ends of the two movable shafts 631 are fixedly connected to the driving pile 632. The driving pile 632 is covered with a limit sleeve 639 on the outside. The limit sleeve 639 is fixed to the frame 61 and is used to limit the range of motion of the driving pile 632 to prevent structural damage caused by excessive movement. The outer sides of the adjacent ends of the two driving piles 632 are fixedly connected to connecting piles 634. The outer sides of the connecting piles 634 are rotatably connected to rotating rods 635 via pins. The other ends of the two rotating rods 635 are rotatably connected to connecting rods 636, forming a four-bar linkage. The other ends of the connecting rods 636 are rotatably connected to transmission rods 637 on both sides. The other ends of the transmission rods 637 are fixedly connected to sliding posts 638. Through this series of connecting rod structures, the rotational motion of the main and auxiliary swing arms 622 is converted into linear reciprocating motion of the sliding posts 638.

[0053] The adjusting member 64 includes a console 641, which is arranged on the inner side of the frame 61, and has an integrated control circuit and a drive system. The motor 643 installed on the outside is a power source. The output end of the motor 643 is fixedly connected to the driving wheel 644. The driving wheel 644 is sleeved on the outer side with a driven wheel 645. The two are connected by friction transmission. The speed of the driven wheel 645 can be controlled by adjusting the driving force of the driving wheel 644 or the friction force of the brake pad 646. The inner side of the console 641 is slidably connected to two brake pads 646. The brake pad 646 is provided on the outer side of the console 641. The inner shape of 46 is perfectly adapted to the arc surface on the outer side of the driven wheel 645. When the sliding column 638 pushes the brake pad 646 toward the driven wheel 645, the brake pad 646 contacts the surface of the driven wheel 645, slowing down the rotation speed of the driven wheel 645 through friction. A limiting groove 642 is provided on the outer side of one end of the control console 641. The other end of the sliding column 638 passes through the limiting groove 642 and is rotatably connected to the outer side of the brake pad 646. The limiting groove 642 guides the movement direction of the sliding column 638, ensuring that the movement of the brake pad 646 is accurate and reliable.

[0054] The conveying member 65 includes two transmission gears 653, which are rotatably connected to the inner side of the frame 61 and mesh with each other, and can transmit power from one gear to another, realizing synchronous transmission of speed and torque. The other sides of the two transmission gears 653 are fixedly connected with discharge roller 1 651 and discharge roller 2 652 respectively. The other end of discharge roller 1 651 is fixedly connected to the outer center of the driven wheel 645. When the speed of the driven wheel 645 changes, the speed of discharge roller 1 651 changes synchronously. Through the meshing action of the transmission gear 653, the speed of discharge roller 2 652 is also adjusted accordingly. The two discharge rollers jointly clamp the spinning and control its conveying speed, thereby realizing dynamic adjustment of the spinning tension, ensuring stable tension of the spinning during the conveying process, and avoiding fiber breakage due to excessive tension or fiber relaxation due to too little tension.

[0055] The polyester filament semi-dull POY melt direct spinning cotton-like spinning process is applicable to the above-mentioned polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment, comprising the following steps:

[0056] S1, melt preparation and transportation: After the raw material slices with good proportions are put into the melting device for melting, the melt is transported to the polyester melt storage tank by a pressure pump. The melt in the storage tank then passes through the melt filter and melt distributor into the spinning machine 4;

[0057] S2, Spinning: The melt enters the spinning box, is accurately metered by the metering pump, and is extruded through the trilobal spinneret to form primary fibers;

[0058] S3, cooling and solidification: After the nascent fibers exit the spinneret, they first pass through a side-blowing device to be initially cooled to above the glass transition temperature to prevent adhesion. They then enter a ring-blowing device to be further cooled to room temperature to form fibers with a certain strength.

[0059] S4, tension adjustment: The cooled spun yarn enters the tension adjustment device, passes through the feeding roller, and enters the subsequent spray box 7 with the discharge roller. When the spinning tension is too high, the feeding roller is lifted, driving the main swing arm 621 and the auxiliary swing arm 622 to rotate in opposite directions. Then, the transmission member 63 drives the two brake pads 646 to move towards each other and contact the driven wheel 645 driven by the motor 643, thereby reducing the speed of the driven wheel 645, thereby reducing the speed of the discharge roller. When the spinning tension is too low, the speed of the discharge roller is increased to stabilize the tension during the spinning and conveying process;

[0060] S5, oiling treatment: The cooled fiber passes through multiple oiling rollers, and the oil is evenly coated on the fiber surface through a nozzle;

[0061] S6, winding and forming: the oiled fiber is introduced into the winding machine 8 through the yarn guide and wound into a yarn cake by the winding roller.

[0062] Working principle: First, the raw material slices prepared in a specific proportion are placed in a melting device for melting treatment. This process is to convert the solid raw materials into liquid melt for subsequent processing. After the melting is completed, the melt is transported to the polyester melt storage tank by the pressure of the pressure pump. The polyester melt storage tank adopts a double-layer jacket structure, which helps to maintain the temperature stability of the melt. The melt in the tank will then pass through a melt filter, whose function is to filter out impurities that may exist in the melt and ensure the purity of the melt. Subsequently, the melt enters the melt distributor, which adopts a tree-like diversion structure to evenly distribute the melt, and then the melt enters the spinning machine 4.

[0063] After the melt successfully enters the spinning manifold of spinning machine 4, the metering pump begins to operate, precisely metering the melt to ensure a consistent and precise amount of melt is extruded each time. The metered melt is then extruded through a spinneret with a trilobal hole design. This unique hole design enables the melt to form nascent fibers with a specific structure after extrusion. Furthermore, the spinneret's openings are arranged in a staggered spiral pattern, which helps improve the uniformity and quality of fiber formation.

[0064] After being extruded from the spinneret, the nascent fibers immediately enter the cooling stage. They first pass through a side-blown bellows, which utilizes a rectangular structure. The air blown by the side-blown bellows initially cools the nascent fibers to above their glass transition temperature (Tg), a temperature range that effectively prevents fiber adhesion. Next, the fibers enter a ring-blown bellows, which utilizes an annular honeycomb-shaped air duct. Here, they are further cooled to room temperature. This cooling process gradually solidifies the fibers, forming fibers with a certain strength that meets the requirements of subsequent processing.

[0065] After cooling, the spun yarn enters the tension adjustment mechanism 6, first passing through the bottom of the feed roller 624. When the spinning tension is too high, the tension on the feed roller drives the main swing arm 621 upward. This swing arm 621 then rotates the auxiliary swing arm 622 in opposite directions via the meshing synchronous gears 623 on the outer side of the rotating shaft. As the main and auxiliary swing arms 622 rotate, the movable shafts 631 in the movable slots 625 on either side of them move accordingly. The movable shafts 631 drive the driving posts 632 in opposite vertical directions, thereby rotating the rotating rod 635. The rotating rod 635 then drives the connecting rod 636 and the transmission rod 637, ultimately causing the sliding post 638 to move within the limiting slot 642 of the control console 641, pushing the two brake pads 646 toward each other. The inner side of the brake pad 646 is shaped to match the outer side of the driven wheel 645. When the brake pad 646 contacts the driven wheel 645 driven by the motor 643, friction increases, reducing the speed of the driven wheel 645. Because discharge roller 1 651 is fixedly attached to the center of the outer side of driven pulley 645 and is linked to discharge roller 2 652 via intermeshing transmission gear 653, the speeds of discharge rollers 1 651 and 652 decrease synchronously, reducing the pulling force on the spinning and lowering the tension. Conversely, when the spinning tension is too low, the above structure reverses, disengaging brake pad 646 from driven pulley 645, increasing the speed of driven pulley 645, and increasing the speed of discharge rollers 1 651 and 652, increasing the pulling force on the spinning, thereby stabilizing the tension during the spinning process.

[0066] After tension adjustment and cooling, the fiber continues to move forward, passing through multiple oiling rollers in the oil spray box 7. The oiling rollers are double-rowed, porous rollers, and the spray nozzles evenly coat the fiber surface with oil. This step forms a protective film on the fiber surface, which not only reduces friction during subsequent processing and prevents static electricity generation, but also improves the fiber's softness and antistatic properties.

[0067] The oiled fibers are introduced through a yarn guide into the winder 8, where they are gradually wound into a yarn cake by winding rollers. This cake is a common storage and transportation form for processed fibers, facilitating subsequent packaging, transportation, and further textile processing. The entire polyester filament semi-matt POY melt-spinning equipment operates in a tightly integrated workflow, with each link working in concert to ultimately transform raw materials into finished yarn cakes.

[0068] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A polyester filament semi-dull POY melt-spinning cotton-like spinning device, comprising a bottom plate (1), characterized in that: The top of the bottom plate (1) is provided with a melt conveyor (2), a booster pump (3), a spinning machine (4), a cooling machine (5), a tension adjustment mechanism (6), an oil spray box (7) and a winding machine (8) in sequence from left to right; The tension adjustment mechanism (6) includes a frame (61), the bottom of the frame (61) is fixedly connected to the top of the bottom plate (1), a sensing member (62) is provided on the outside of the frame (61), a transmission member (63) is provided on the outside of the sensing member (62), an adjustment member (64) is provided on the outside of the frame (61), and a conveying member (65) is provided at the output end of the adjustment member (64); The sensing element (62) includes a main swing arm (621) and a secondary swing arm (622), one end of each of the main swing arm (621) and the secondary swing arm (622) is rotatably connected to the outside of the frame (61), and a rotating shaft is provided at the rotating end of each of the main swing arm (621) and the secondary swing arm (622). Synchronous gears (623) are fixedly connected to the outside of the rotating shafts of each of the main swing arm (621) and the secondary swing arm (622), and the two synchronous gears (623) are meshed with each other. A feed roller (624) is rotatably connected to the bottom of the main swing arm (621), and movable grooves (625) are provided on both sides of the main swing arm (621) and the secondary swing arm (622).

2. The polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment according to claim 1, characterized in that: The transmission member (63) includes a movable shaft (631), which is movably connected to the inside of the movable groove (625), and the two movable shafts (631) are fixedly connected to the driving piles (632) at their far ends. A limiting block (633) is provided inside the movable groove (625), and the outer sides of the two driving piles (632) are sleeved with a limiting sleeve (639). The outer sides of the adjacent ends of the two driving piles (632) are fixedly connected to the connecting piles (634), and the outer sides of the connecting piles (634) are rotatably connected to the rotating rods (635). The other ends of the two rotating rods (635) are rotatably connected to the connecting rods (636). The other ends of the connecting rods (636) are rotatably connected to the transmission rods (637) on both sides, and the other end of the transmission rod (637) is fixedly connected to the sliding column (638).

3. The polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment according to claim 2, characterized in that: The adjusting member (64) includes a control console (641), which is arranged on the inner side of the frame (61). A motor (643) is installed on the outside of the control console (641). The output end of the motor (643) is fixedly connected to a driving wheel (644). A driven wheel (645) is sleeved on the outer side of the driving wheel (644). The driving wheel (644) and the driven wheel (645) are connected by friction transmission. Two brake pads (646) are slidably connected to the inner side of the control console (641), and the inner side shape of the brake pads (646) is adapted to the outer side shape of the driven wheel (645). A limiting groove (642) is provided on the outer side of one end of the control console (641). The other end of the sliding column (638) passes through the limiting groove (642) and is rotatably connected to the outer side of the brake pad (646).

4. The polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment according to claim 1, characterized in that: The conveying member (65) includes two transmission gears (653), which are rotatably connected to the inner side of the frame (61) and mesh with each other. The other sides of the two transmission gears (653) are respectively fixedly connected to a discharge roller 1 (651) and a discharge roller 2 (652). The other end of the discharge roller 1 (651) is fixedly connected to the outer center of the driven wheel (645).

5. The polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment according to claim 1, characterized in that: The melt conveyor (2) comprises a polyester melt storage tank, a melt filter, a melt distributor and a temperature controller. The polyester melt storage tank is arranged on the top of the bottom plate (1), the melt filter is arranged at the outlet of the polyester melt storage tank, the melt distributor is connected to the outlet of the melt filter, and the temperature controller is arranged outside the polyester melt storage tank. The polyester melt storage tank adopts a double-layer jacket structure, a conical guide port is arranged at the bottom of the polyester melt storage tank, the melt distributor adopts a tree-like diversion structure, and the inner wall of the flow channel of the melt distributor is polished.

6. The polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment according to claim 1, characterized in that: The spinning machine (4) comprises a screw extruder, a spinneret, a metering pump and a spinning box, wherein the screw extruder is arranged on the top of the bottom plate (1), the spinneret is arranged at the outlet of the screw extruder, the spinning box is arranged at the outlet of the screw extruder and corresponds to the outlet of the spinneret, the metering pump is arranged outside the spinning box, the hole shape of the spinneret is designed to be a three-leaf shape, the opening arrangement of the spinneret adopts a staggered spiral distribution, and the inner wall of the spinning box is sprayed with an anti-stick coating.

7. The polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment according to claim 1, characterized in that: The cooling machine (5) comprises a side-blowing bellows and a ring-blowing bellows, both of which are arranged on the top of the bottom plate (1), and the side-blowing bellows are arranged at the front end of the ring-blowing bellows. The side-blowing bellows adopts a rectangular bellows structure, and the ring-blowing bellows adopts an annular honeycomb wind tube.

8. The polyester filament semi-dull POY melt direct spinning cotton-like spinning equipment according to claim 1, characterized in that: The oil spray box (7) comprises an oil storage tank, a nozzle and an oiling roller. The oil storage tank is arranged on the top of the oil spray box (7), the nozzle is arranged on the inner top of the oil spray box (7), and the oiling roller is arranged inside the oil spray box (7). The oiling roller adopts a double-row porous roller, and the center of the oiling roller corresponds to the center of the nozzle outlet.

9. A process for the direct melt spinning of polyester filament semi-dull POY imitation cotton, applicable to the polyester filament semi-dull POY direct melt spinning imitation cotton spinning equipment according to any one of claims 1 to 8, characterized in that: The steps include: S1. Melt preparation and transportation: After the proportioned raw material slices are put into the melting device for melting, the melt is transported to the polyester melt storage tank by a pressure pump. The melt in the storage tank then passes through the melt filter and melt distributor into the spinning machine (4); S2, Spinning: The melt enters the spinning box, is accurately metered by the metering pump, and is extruded through the trilobal spinneret to form primary fibers; S3, cooling and solidification: After the nascent fibers exit the spinneret, they first pass through a side-blowing device to be initially cooled to above the glass transition temperature to prevent adhesion. They then enter a ring-blowing device to be further cooled to room temperature to form fibers with a certain strength. S4, tension adjustment: the cooled spinning enters the tension adjustment device, passes through the feeding roller, and enters the subsequent spray box (7) with the discharging roller. When the spinning tension is too large, the feeding roller is lifted to drive the main swing arm (621) and the auxiliary swing arm (622) to rotate in opposite directions, and then drives the two brake pads (646) to move in opposite directions through the transmission member (63) and contact the driven wheel (645) driven by the motor (643), thereby reducing the speed of the driven wheel (645), thereby reducing the speed of the discharging roller 1 (651) and the discharging roller 2 (652). When the spinning tension is too small, the speed of the discharging roller 1 (651) and the discharging roller 2 (652) is increased to stabilize the tension during the spinning conveying process; S5, oiling treatment: The cooled fiber passes through multiple oiling rollers, and the oil is evenly coated on the fiber surface through a nozzle; S6. Winding: The oiled fibers are introduced into the winding machine (8) through the yarn guide and wound into a yarn cake by the winding roller.

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