Continuous polymerization melt direct spinning polyester fiber automatic production system

Abstract

The invention relates to the technical field of fiber production, in particular to an automatic production system for continuous polymerization melt direct spinning polyester fibers. Comprising a spinning box, a spinning channel, a drawing machine and a winding machine, and further comprises a pretreatment mechanism, the pretreatment mechanism is arranged in the spinning channel and used for conducting primary dyeing while cooling nascent fibers, and the pretreatment mechanism comprises an air control assembly arranged in the middle of the spinning channel and a circulation assembly arranged at the bottom of the spinning channel; dye steam enters the spinning channel through the circulating assembly and moves along a preset track through the air control assembly to dye nascent fibers; the dyeing mechanism is arranged between the drafting machine and the winding machine and used for conducting secondary dyeing on the fibers, the dyeing mechanism comprises a dyeing assembly arranged behind the drafting machine and a stranding assembly arranged behind the dyeing mechanism, the dyeing assembly conducts secondary dyeing on the drafted fibers, and the stranding assembly conducts stranding on the drafted fibers. And plying the plurality of fibers by using the plying assembly.

Description

Technical Field

[0001] The invention relates to the technical field of fiber production, in particular to an automatic production system for continuous polymerization melt-spinning polyester fibers. Background Art

[0002] Direct fiber spinning is a highly efficient and energy-efficient polyester fiber production process. It directly pipes the molten polyester (PET) produced by the esterification and polycondensation of PTA (terephthalic acid) and EG (ethylene glycol) into the spinning system, eliminating the cooling, pelletizing, drying, and remelting steps required in traditional chip spinning. This technology utilizes precisely controlled melt delivery, filtration, and spinning equipment to extrude the high-viscosity polyester melt through a spinneret, followed by cooling and stretching to produce filament products such as POY and FDY. With its advantages of low energy consumption, minimal pollution, and consistent fiber quality, it is widely used in the textile and industrial sectors and is currently the mainstream technology for large-scale polyester fiber production.

[0003] However, in the actual production process, there are two methods for fiber dyeing. One is to add the dye to the melt and then spin it. This method is not easy to change the color and is prone to spinneret blockage and uneven dyeing. The other is to dye the formed fibers. The fibers dyed in this way have low color fastness and will also cause uneven dyeing. Summary of the Invention

[0004] The purpose of the present invention is to address the shortcomings of the existing technology. By setting up a pretreatment mechanism and a dyeing mechanism, deep dyeing of the primary fiber and secondary dyeing treatment of the surface color of the primary fiber after stretching are completed, the technical problems of uneven dyeing, difficulty in color change and low color fastness that are easily encountered in the two existing dyeing methods are solved.

[0005] In response to the above technical problems, the technical solutions adopted are as follows: A continuous polymerization melt direct spinning polyester fiber automatic production system, including a spinning box, a spinning shaft, a drafting machine and a winder, and also includes: A pretreatment mechanism is provided in the spinning shaft and is used to perform preliminary dyeing on the nascent fibers while cooling them. The pretreatment mechanism includes an air control assembly provided in the middle of the spinning shaft and a circulation assembly provided at the bottom of the spinning shaft. Dye vapor enters the spinning shaft through the circulation assembly and moves along a preset trajectory through the air control assembly to dye the nascent fibers. The wind control assembly includes an outer wind box arranged at the circumference of the spinning tunnel and a central wind box arranged at the center of the spinning tunnel; The dyeing mechanism is arranged between the drafting machine and the winder and is used to perform secondary dyeing on the fibers. The dyeing mechanism includes a dyeing component arranged behind the drafting machine and a plying component arranged behind the dyeing mechanism. The dyeing component performs secondary dyeing on the drafted fibers and uses the plying component to ply multiple fibers.

[0006] Preferably, the circulation component includes an evaporator arranged outside the inner circumference of the spinning tunnel, an isolation air ring arranged in the center of the spinning tunnel and horizontally located above the evaporator, and a negative pressure device arranged on the upper part of the isolation air ring.

[0007] Preferably, the wind control assembly includes a stabilizing member arranged on the top of the outer wind box and the central wind box, the stabilizing member includes an isolation plate arranged on the top of the outer wind box and the central wind box, a directional tube arranged on the isolation plate and used to allow the fiber to pass through the isolation plate, a plurality of first air outlets arranged at the end of the directional tube and used to keep the fiber moving stably, a dye tube with an upper end arranged in the middle of the directional tube and a bottom end arranged above the evaporator, and a blocking block arranged at the upper opening of the dye tube.

[0008] Preferably, four groups of dyeing air rings are provided on the outer bellows and the central bellows, namely, air ring No. 1, air ring No. 2, air ring No. 3 and air ring No. 4 from top to bottom, and each group of dyeing air rings includes an air outlet end and an air suction end respectively arranged on the outer bellows and the central bellows, and the air outlet end and the air suction end of the upper and lower groups of adjacent dyeing air rings are alternately arranged on the outer bellows and the central bellows, and the air suction end of the upper air ring is connected to the air outlet end of the lower air ring, the wind directions of air ring No. 1 and air ring No. 2, and air ring No. 3 and air ring No. 4 are opposite, and the wind paths are the same, and the wind directions of air ring No. 2 and air ring No. 3 are staggered.

[0009] Preferably, the wind control assembly also includes a supplementary part arranged at the lower part of the central wind box, and the supplementary part includes a tracking block arranged at the bottom of the central wind box, a plurality of spray holes evenly arranged along the circumference of the tracking block, and an air nozzle arranged at the lower part of the spray hole and connected to the suction end of the No. 4 wind ring.

[0010] Preferably, the dyeing assembly includes a dye pool arranged behind the drawing machine, multiple sets of driving rollers arranged in the dye pool, a stabilizing shaft arranged behind the dye pool, a vibrating member arranged in front of the dyeing pool, and an air jet member arranged behind the vibrating member.

[0011] Preferably, the vibrating member comprises two groups of wave rods arranged at the bottom of the dye pool, a vibrating rod arranged between the two wave rods and sliding horizontally, and a large number of protrusions are arranged at the bottom of the vibrating rod; Three sets of stretching rods are arranged behind the two sets of wave rods and slide vertically.

[0012] Preferably, the jet component includes two groups of friction rods arranged above the dye pool, friction blocks horizontally slidably connected to the friction rods, multiple groups of spoiler blades rotatably connected between the two groups of friction rods, and a negative pressure device with an air pipe arranged above the spoiler blades and the air pipe connected to the circulation component.

[0013] Preferably, the stranding assembly includes a branching groove arranged behind the jet part, an annular wire groove arranged behind the branching groove, a torsion piece arranged behind the annular wire groove, the torsion piece includes a swivel rotatably connected to the bottom of the dye pool, a clamping claw arranged in the middle of the swivel, speed control coils respectively arranged in front of the branching groove and behind the torsion piece, and a hot roller arranged behind the speed control coil.

[0014] Beneficial effects of the present invention: (1) The present invention provides a wind control component in the pretreatment mechanism and utilizes a combination of an outer bellows and a central bellows to dissipate heat from multiple angles to ensure that the surface of the fiber can be evenly cooled, thereby improving heat dissipation efficiency. (2) The present invention combines the fiber cooling step with the dyeing step by providing a pretreatment mechanism, and performs deep dyeing without affecting the normal cooling process of the fiber. The heat generated when the fiber is produced and the airflow required for cooling are utilized, and the fiber is dyed by adding dye vapor, so that the dye molecules can penetrate deep into the fiber. (3) The present invention uses a dyeing mechanism in conjunction with a pretreatment mechanism to perform secondary dyeing on the fibers, utilizing a combination of dye vapor dyeing and dye solution dyeing to improve the color fastness of the dyeing and, on the other hand, the dyeing efficiency and uniformity. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of an automatic production system for continuous polymerization melt-spinning polyester fibers.

[0016] Figure 2 It is a schematic diagram of the overall structure of the pretreatment mechanism.

[0017] Figure 3 Schematic diagram of the internal structure of the pretreatment mechanism.

[0018] Figure 4 Schematic diagram of the structure of the stabilizing part.

[0019] Figure 5Schematic diagram of the gas flow in the stabilizer.

[0020] Figure 6 Schematic diagram of the gas flow direction on the horizontal and vertical planes of the first air outlet.

[0021] Figure 7 Schematic diagram of gas flow on the vertical surface of the dyeing wind ring.

[0022] Figure 8 Schematic diagram of gas flow in the horizontal plane of the dyeing wind ring.

[0023] Figure 9 This is a structural diagram of the supplementary parts.

[0024] Figure 10 Schematic diagram of the dyeing mechanism.

[0025] Figure 11 Schematic diagram of the structure of the vibrating component.

[0026] Figure 12 It is a structural diagram of the jet component.

[0027] Figure 13 It is a partial structural diagram of the plywood component.

[0028] Figure 14 Schematic diagram of the movement trajectory of the fiber in the dyeing mechanism. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1 like Figure 1 As shown, a continuous polymerization melt direct spinning polyester fiber automatic production system includes a spinning box 01, a spinning shaft 02, a drafting machine 03 and a winder 04, and also includes: A pretreatment mechanism 1 is provided in the spinning shaft 02 and is used to perform preliminary dyeing while cooling the nascent fibers. The pretreatment mechanism 1 includes an air control assembly 11 provided in the middle of the spinning shaft 02 and a circulation assembly 12 provided at the bottom of the spinning shaft 02. Dye vapor enters the spinning shaft 02 through the circulation assembly 12 and moves along a preset trajectory through the air control assembly 11 to dye the nascent fibers. The wind control assembly 11 includes an outer wind box 111 arranged at a circumferential position of the spinning tunnel 02 and a central wind box 112 arranged at the center of the spinning tunnel 02; The dyeing mechanism 2 is arranged between the drafting machine 03 and the winder 04 and is used to perform secondary dyeing on the fibers. The dyeing mechanism 2 includes a dyeing component 21 arranged behind the drafting machine 03 and a plying component 22 arranged behind the dyeing mechanism 2. The dyeing component 21 performs secondary dyeing on the drafted fibers and uses the plying component 22 to ply multiple fibers.

[0031] In this embodiment, the pretreatment mechanism 1 and the dyeing mechanism 2 are provided to complete the dyeing of the fiber during the continuous production process. In the prior art, for dyeing the fiber, the method of dyeing by directly adding dyeing ions or pigments to the melt is called "melt direct dyeing" or "solution dyeing". This method adds a masterbatch (containing a high concentration of pigments or high-temperature resistant disperse dyes) to the polyester melt (the molten polymer in the direct spinning process), and directly spins the pigment / dye molecules evenly dispersed in the melt after uniform blending by a screw. The fiber has color after forming and does not require a subsequent dyeing process. The fiber produced by this method has excellent color fastness and is environmentally friendly and efficient, suitable for mass production. However, it also has certain defects, such as its color is fixed before production, difficult to flexibly adjust, and it is difficult to achieve light or bright colors; the addition of pigments may reduce the strength of the fiber and form color spots due to uneven dispersion, affecting the appearance; high-temperature resistant pigments and special equipment increase costs, and waste recycling is also complicated by pigment mixing; therefore, the present application performs secondary dyeing on the primary fiber to ensure color fastness while making the dyeing process more flexible.

[0032] In the existing melt-spinning process, the melt is melted through the spinning box 01 to become thicker nascent fibers, and then input into the spinning tunnel 02 for cooling. The cooled nascent fibers enter the drawing machine 03 for multi-stage drawing to complete fiber formation, and are then wound up by the winder 04.

[0033] Specifically in this application, the melt forms primary fibers in the spinneret of the spinning box 01 and enters the spinning shaft 02. In the spinning shaft 02, the pretreatment mechanism 1 is used to cool the fibers while completing the primary dyeing. The fibers are then input into the drawing machine 03 for drawing. The drawn fibers are input into the dyeing mechanism 2 for secondary dyeing, and the fibers are ply-plyed and then wound up by the winder 04.

[0034] It should be noted that the two dyeing processes are carried out respectively by dye vapor and dye solution. The dye vapor is used for dyeing when the nascent fiber has not completely cooled down. The high temperature enables the dye molecules to penetrate into the fiber to complete the deep dyeing. Then, the fiber is immersed in the dyeing solution for supplementary dyeing to ensure the uniformity of the dyeing.

[0035] Further, if Figure 2 、 Figure 3As shown, the circulation component 12 includes an evaporator 121 arranged outside the inner circumference of the spinning tunnel 02, an isolation air ring 122 arranged in the center of the spinning tunnel 02 and horizontally located at the evaporator 121, and a negative pressure device 123 arranged on the upper part of the isolation air ring 122.

[0036] In this embodiment, dye vapor is input into the spinning tunnel 02 by setting an evaporator 121, and the vapor escapes upward from the edges of the spinning tunnel 02. A wind control component 11 is provided above the circulation component 12, and the air flow carrying dye vapor passing through the wind control component 11 is downwardly input to the isolation air ring 122. The isolation air ring 122 is provided around the fiber and sprays air obliquely upward toward the fiber, so that the air flow carrying the dye cannot be slowed down by the isolation, and is impacted to the vicinity of the negative pressure device 123 and is drawn out by the negative pressure device 123 to form an air flow circulation.

[0037] Specifically, by placing the evaporator 121 around the spinning shaft 02, the dye vapor is naturally dispersed upward. During this upward escape, the dye vapor can also fill the air that has not passed through the airflow with dye. This allows the dye to diffuse throughout the entire shaft, ensuring that all areas of the fiber passing through are exposed to the dye vapor. This ensures that the fiber is exposed to the dye throughout the entire cooling process, while also improving the uniformity of the dye.

[0038] Further, if Figure 2-Figure 6 As shown, the wind control component 11 includes a stabilizing member 113 arranged on the top of the outer wind box 111 and the central wind box 112, the stabilizing member 113 includes an isolation plate 1131 arranged on the top of the outer wind box 111 and the central wind box 112, a directional tube 1132 arranged on the isolation plate 1131 and used to allow the fiber to pass through the isolation plate 1131, a plurality of first air outlets 1133 arranged at the end of the directional tube 1132 and used to keep the fiber moving stably, a dye tube 1134 with an upper end arranged in the middle of the directional tube 1132 and a bottom end arranged above the evaporator 121, and a blocking block 1135 arranged at the upper opening of the dye tube 1134.

[0039] In this embodiment, by providing the directional tube 1132, the dye vapor is allowed to fully contact the fiber while ensuring the stable movement of the fiber.

[0040] In detail, after the nascent fiber enters the directional tube 1132, it passes through the first air outlet 1133. The first air outlet 1133 is arranged around the fiber and presents a certain angle on the horizontal plane, so that the airflow blows over the edge of the fiber instead of flowing directly towards the fiber. At the same time, it presents an inclined downward angle on the vertical plane, so that the airflow can blow downward. After the fiber enters the directional tube 1132, under the action of the pressure of the airflow in the directional tube 1132, the dye true gas released by the evaporator 121 is drawn into the directional tube 1132 through the dye tube 1134, and the dye is evenly diffused into the directional tube 1132 through the block 1135.

[0041] It should be noted that, by adjusting the wind direction of the first air outlet 1133, the first air outlet 1133 can be used for multiple purposes. First, the wind direction blown evenly from all sides by the first air outlet 1133 can make the fiber stabilize in the center of the directional tube 1132 under the action of the airflow when entering the directional tube 1132, and will not shake due to unstable airflow, causing the fiber to contact the directional tube 1132, and affecting the quality of the fiber when the fiber is not completely cooled; second, by the tendency of the wind direction of the first air outlet 1133, the wind will not blow directly at the fiber, but blow from the side of the fiber, avoiding the fiber not being cooled. , the larger wind force affects the fiber surface and causes the fiber to deform; thirdly, through the downward airflow, on the one hand, it cooperates with the isolation plate 1131 to form an isolation effect on the dye vapor, preventing the dye vapor from moving upward, and at the same time preventing the upward airflow from affecting the stability of the fiber from the spinneret to the cooling stage, causing uneven cooling of the fiber surface; on the other hand, the downward airflow guides the dye vapor, extracting the dye vapor from the dye tube 1134 while allowing the dye vapor to move downward with the fiber, thereby increasing the contact market between the dye vapor and the fiber and allowing the dye molecules to fully enter the interior of the fiber.

[0042] Further, if Figure 3 、 Figure 7 、 Figure 8 As shown, four groups of dyeing air rings 114 are provided on the outer wind box 111 and the central wind box 112, which are air ring No. 1, air ring No. 2, air ring No. 3 and air ring No. 4 from top to bottom. Each group of dyeing air rings 114 includes an air outlet end and an air suction end respectively arranged on the outer wind box 111 and the central wind box 112. At the same time, the air outlet end and the air suction end of the upper and lower groups of adjacent dyeing air rings 114 are alternately arranged on the outer wind box 111 and the central wind box 112. At the same time, the air suction end of the upper air ring is connected to the air outlet end of the lower air ring. The wind directions of the No. 1 air ring and the No. 2 air ring, and the No. 3 air ring and the No. 4 air ring are opposite, and the wind paths are the same. The wind directions of the No. 2 air ring and the No. 3 air ring are staggered.

[0043] Further, if Figure 9As shown, the wind control component 11 also includes a supplementary part 115 arranged at the lower part of the central wind box 112, and the supplementary part 115 includes a tracking block 116 arranged at the bottom of the central wind box 112, a plurality of spray holes 117 evenly arranged along the circumference of the tracking block 116, and an air nozzle 118 arranged at the lower part of the spray hole 117 and connected to the suction end of the No. 4 wind ring.

[0044] In this embodiment, four sets of dyeing air rings 114 are provided to allow the airflow carrying dye vapor to shuttle back and forth between the fibers. At this time, the fibers have been preliminarily cooled, and the wind force is used to make the dye vapor impact the fibers, thereby promoting the dye molecules to enter the fibers.

[0045] Specifically, the outlet of the No. 1 air ring is set on the central air box 112, blowing the dye vapor blown out of the guide tube outward. At this time, the outlet of the No. 1 air ring is facing the fiber, allowing the dye to fully contact the fiber. After passing through the suction end, the airflow is transferred to the outlet of the No. 2 air ring and output inward facing the fiber. It also enters the No. 3 air ring through the suction end. At this time, the outlet of the No. 3 air ring is set on one side of the fiber. Then the No. 4 air ring continues to repeat. The airflow of the No. 3 and No. 4 air rings flows through both sides of the fiber. The pressure of the airflow is used to make the dye molecules that are not firmly fixed on the fiber surface detach from the fiber, avoiding the influence of the subsequent dyeing when the dye molecules are not firmly fixed. The fiber then enters the nozzle 117 of the tracking block 116. The nozzle 117 is provided with an air nozzle 118, so that the airflow follows the moving direction of the fiber and is ejected for the final replenishment.

[0046] The dye vapor is at its highest concentration when it is drawn out from the dye tube 1134. It comes into contact with the uncooled fibers in the guide tube, allowing the dye molecules to fully contact the fibers and penetrate deep into the fibers. The airflow of multiple wind rings then pushes the dye out of the fibers, using wind force to bring the dye into contact with the fibers and remove any dye that is not firmly fixed on the surface. The dye is then replenished through the replenishing piece 115. Through this three-step process, the dye vapor is brought into full contact with the fibers, improving their firmness.

[0047] Further, if Figure 10 、 Figure 14 As shown, the dyeing component 21 includes a dye pool 211 arranged behind the drawing machine 03, a plurality of drive rollers 212 arranged in the dye pool 211, a stabilizing shaft 213 arranged at the rear of the dye pool 211, a vibrating member 214 arranged in the front of the dyeing pool, and an air jet member 215 arranged behind the vibrating member 214.

[0048] Further, if Figure 11 、 Figure 14As shown, the vibrating member 214 includes two groups of wave rods 2141 arranged at the bottom of the dye pool 211, a vibration rod 2142 arranged between the two wave rods 2141 and sliding horizontally, and a large number of protrusions are provided on the bottom of the vibration rod 2142; Three groups of stretching rods 2143 are arranged behind the two groups of wave rods 2141 and slide vertically.

[0049] Further, if Figure 12 、 Figure 14 As shown, the jet component 215 includes two groups of friction rods 2151 arranged above the dye pool 211, friction blocks 2152 horizontally slidably connected to the friction rods 2151, multiple groups of spoiler blades 2153 rotatably connected between the two groups of friction rods 2151, and a negative pressure device 123 with an air pipe arranged above the spoiler blades 2153 and the air pipe connected to the circulation component 12.

[0050] In this embodiment, a plurality of driving rollers 212 are provided to move the fibers, thereby completing the secondary dyeing and plying operations in sequence.

[0051] In detail, the fiber is driven into the dye solution of the dye pool 211 by the driving roller 212; the fiber passes through the middle of the wave rod 2141 and the vibration rod 2142, and the vibration rod 2142 moves back and forth under the drive of the electric cylinder, and the protrusions on the lower surface are used to vibrate the fiber, and the vibration is used to remove the dye that is not tightly fixed on the fiber surface again, and then the fiber is input into the middle of the stretching rod 2143. The stretching rod 2143 moves to cause a slight stretching of the fiber. This section of the fiber is all in the dye solution, and the excess dye is separated by vibration and then stretched to allow the dye solution to fully penetrate into the fiber, completing the secondary dyeing and improving the uniformity and color fastness of the dyeing.

[0052] The fiber then moves out of the dye solution and moves to the position of the jet part 215. At this time, the dye vapor extracted by the circulation part is sprayed from above, and the friction block 2152 moves back and forth on the friction rod 2151, causing the middle fiber to rotate, thereby promoting the dye vapor to evenly adhere to the fiber surface.

[0053] It should be noted that after the fiber is initially dyed with dye vapor, the dye molecules may be detached after the primary fiber is stretched, resulting in uneven dyeing of the fiber. Therefore, the fiber is dyed a second time with a dye solution, and vibration and stretching are used to promote the fiber to absorb the solution, thereby further filling the areas where the dye vapor has not penetrated, and continuing to adhere the dye to the surface in the future, so that the dye can fully wrap the fiber.

[0054] Further, if Figure 13 、 Figure 14As shown, the plying component 22 includes a line dividing groove 221 arranged behind the jet component 215, an annular wire groove 222 arranged behind the line dividing groove 221, a torsion piece 223 arranged behind the annular wire groove 222, the torsion piece 223 includes a swivel 2231 rotatably connected to the bottom of the dye pool 211, a clamping claw 2232 arranged in the middle of the swivel 2231, speed control coils 2233 respectively arranged in front of the line dividing groove 221 and behind the torsion piece 223, and a hot roller 2234 arranged behind the speed control coil 2233.

[0055] In this embodiment, a plying assembly 22 is provided to combine multiple fibers into one strand.

[0056] In detail, the fiber passes through the branching groove 221 to separate the fibers, and then passes through the annular wire groove 222 to distribute the fibers in an annular shape. The fiber then passes through the rotating ring 2231, and the fibers are pinched together by the clamping claws 2232 on the rotating ring 2231, and the rotating ring 2231 is rotated, so that the fibers from the rotating ring 2231 to the annular wire groove 222 are twisted together, and then passed through the hot roller 2234 for drying, and input into the winder 04 through the rear stable rotating shaft 213.

[0057] It should be noted that since the dyeing component 21 in front of the stranding component 22 and the winder 04 at the rear are both working continuously, the stranding component 22 can only work intermittently for stranding the fibers, twisting them one section at a time. Therefore, speed control coils 2233 are provided in front and behind the stranding component 22, which are controlled by a motor, and the winding direction of the speed control coil 2233 is consistent with the moving direction of the fiber, so that when the fiber is twisted, the front coil rotates stably and continuously receives the fiber from the dyeing component 21. After the fiber twisting is completed, a new section of the coil that needs to be bonded is pulled out from the front coil, and at the same time, the rear coil rotates rapidly to wind up the bonded coil. The rear coil does not rotate during bonding, and the fiber is pulled out of the coil by the driving roller 212.

[0058] It is worth mentioning that for the plying of fibers, in order to make the plying of fibers stronger, dyes can be selected and disperse dyes can be used to make the dyes have a certain viscosity so that they can cooperate with the twisting of the fibers. At the same time, the twisting is carried out in the dye solution, and a part of the dye solution is wrapped into the middle of the fiber. In the subsequent winding process, part of the dye is squeezed out, and part of the dye enters the fiber under pressure, further improving the dyeing effect of the fiber.

[0059] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0060] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0061] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art based on the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A continuous polymerization melt-spinning polyester fiber automatic production system, comprising a spinning tunnel (02), a drafting machine (03), and a winder (04) arranged in sequence from front to back, characterized in that: The spinning shaft (02) is provided with a pretreatment mechanism (1) for cooling the nascent fibers and performing preliminary dyeing at the same time. The pretreatment mechanism (1) comprises an air control component (11) arranged in the middle of the spinning shaft (02) and a circulation component (12) arranged at the bottom of the spinning shaft (02). Dye vapor enters the spinning shaft (02) through the circulation component (12) and moves along a preset trajectory through the air control component (11) to dye the nascent fibers. The air control component (11) comprises an outer wind box (111) arranged at a circumferential position of the spinning shaft (02) and a central wind box (112) arranged in the center of the spinning shaft (02). A dyeing mechanism (2) for performing secondary dyeing on the fibers is provided between the drafting machine (03) and the winder (04). The dyeing mechanism (2) comprises a dyeing component (21) provided at the rear of the drafting machine (03) and a plying component (22) provided at the rear of the dyeing mechanism (2). The dyeing component (21) performs secondary dyeing on the drafted fibers and utilizes the plying component (22) to ply a plurality of fibers.

2. The continuous polymerization melt direct spinning polyester fiber automatic production system according to claim 1, characterized in that: The circulation assembly (12) comprises an evaporator (121) arranged outside the inner circumference of the spinning tunnel (02), an isolation air ring (122) arranged at the center of the spinning tunnel (02) and horizontally located above the evaporator (121), and a negative pressure device (123) arranged above the isolation air ring (122).

3. The continuous polymerization melt direct spinning polyester fiber automatic production system according to claim 2, characterized in that: The wind control assembly (11) comprises a stabilizing member (113) arranged on the top of the outer wind box (111) and the central wind box (112); the stabilizing member (113) comprises an isolation plate (1131) arranged on the top of the outer wind box (111) and the central wind box (112); a directional tube (1132) arranged on the isolation plate (1131) and used for allowing fibers to pass through the isolation plate (1131); a plurality of first air outlets (1133) arranged at the end of the directional tube (1132) and used for maintaining stable movement of the fibers; a dye tube (1134) with its upper end arranged in the middle of the directional tube (1132) and its bottom end arranged above the evaporator (121); and a blocking block (1135) arranged at the upper opening of the dye tube (1134).

4. The continuous polymerization melt direct spinning polyester fiber automatic production system according to claim 1, characterized in that: Four groups of dyeing air rings (114) are provided on the outer wind box (111) and the central wind box (112), which are respectively No. 1 wind ring, No. 2 wind ring, No. 3 wind ring and No. 4 wind ring from top to bottom. Each group of dyeing air rings (114) includes an air outlet end and an air suction end respectively provided on the outer wind box (111) and the central wind box (112). At the same time, the air outlet end and the air suction end of the upper and lower adjacent dyeing air rings (114) are respectively alternately provided on the outer wind box (111) and the central wind box (112). At the same time, the air suction end of the upper air ring is connected to the air outlet end of the lower air ring. The wind directions of the No. 1 wind ring and the No. 2 wind ring, and the No. 3 wind ring and the No. 4 wind ring are opposite, but the wind paths are the same. The wind directions of the No. 2 wind ring and the No. 3 wind ring are staggered.

5. The automatic production system for continuous polymerization melt-spinning polyester fibers according to claim 4, characterized in that: The wind control assembly (11) further includes a supplementary component (115) arranged at the lower portion of the central wind box (112); the supplementary component (115) includes a tracking block (116) arranged at the bottom of the central wind box (112); a plurality of spray holes (117) uniformly arranged along the circumference of the tracking block (116); and an air nozzle (118) arranged at the lower portion of the spray hole (117) and connected to the suction end of the fourth wind ring.

6. The continuous polymerization melt direct spinning polyester fiber automatic production system according to claim 1, characterized in that: The dyeing assembly (21) comprises a dye pool (211) arranged at the rear of the drawing machine (03), a plurality of drive rollers (212) arranged in the dye pool (211), a stabilizing shaft (213) arranged at the rear of the dye pool (211), a vibrating member (214) arranged at the front of the dye pool, and an air jet member (215) arranged at the rear of the vibrating member (214).

7. The automatic production system for continuous polymerization melt-spinning polyester fibers according to claim 6, characterized in that: The vibrating member (214) comprises two groups of wave rods (2141) arranged at the bottom of the dye pool (211), a vibrating rod (2142) arranged between the two wave rods (2141) and sliding horizontally, and a large number of protrusions arranged at the bottom of the vibrating rod (2142); Three groups of stretching rods (2143) are arranged behind the two groups of wave rods (2141) and slide vertically.

8. The continuous polymerization melt direct spinning polyester fiber automatic production system according to claim 7, characterized in that: The jet component (215) comprises two groups of friction rods (2151) arranged above the dye pool (211), friction blocks (2152) horizontally slidably connected to the friction rods (2151), multiple groups of turbulent blades (2153) rotatably connected between the two groups of friction rods (2151), and a negative pressure device (123) having an air pipe arranged above the turbulent blades (2153) and connected to the circulation component (12).

9. The continuous polymerization melt direct spinning polyester fiber automatic production system according to claim 8, characterized in that: The plying assembly (22) comprises a line dividing groove (221) arranged behind the air jet component (215), an annular conductor groove (222) arranged behind the line dividing groove (221), a twisting member (223) arranged behind the annular conductor groove (222), the twisting member (223) comprising a rotating ring (2231) rotatably connected to the bottom of the dye pool (211), a clamping claw (2232) arranged in the middle of the rotating ring (2231), a speed control coil (2233) respectively arranged in front of the line dividing groove (221) and behind the twisting member (223), and a hot roller (2234) arranged behind the speed control coil (2233).

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