A process for the production of a blended yarn

Abstract

The application discloses a production method and production process of three kinds of blended yarns, relates to the production technical field of blended yarns, and particularly relates to a production method and production process of three kinds of blended yarns. Pre-oxygen filament, flame-retardant artificial cotton and polyester fiber are sequentially sent through a cotton cleaning machine, a cotton carding machine, a line separating device, a drawing frame, a roving frame, a spinning frame and a bobbin winder to spin the blended yarns. The raw material quality ratio of the blended yarns is as follows: the pre-oxygen filament is 30-40%, the polyester fiber is 25-35%, and the flame-retardant artificial cotton is 30-40%. In the application, the preformed line strip is rubbed against the side plate, so that the side plate can effectively clean the excess wool on the surface of the preformed line strip, and the side plate can be adjusted to the initial state through cooperation of the connecting spring and the positioning pin; the heating chamber guides high-temperature gas into the inside of the limiting frame through cooperation of the air pipe and the positioning pin, so that the high-temperature gas performs high-temperature disinfection treatment on the preformed line strip and provides dry treatment for the preformed line strip.

Description

Technical Field

[0001] This invention relates to the field of blended yarn production technology, specifically a blended yarn production process. Background Technology

[0002] Blended yarn refers to single yarn made by blending two or more different types of fibers.

[0003] In patent application CN111270380A, this invention relates to a flame-retardant and high-temperature resistant pre-oxidized aramid blended yarn and its production method. The blended yarn consists of 50-90% pre-oxidized chopped fibers and 50-10% aramid 1313 chopped fibers by mass. The production process includes: pre-treating the pre-oxidized chopped fibers and aramid chopped fibers separately; mixing the pre-oxidized chopped fibers and aramid 1313 chopped fibers in a cotton bale and forming a cotton lap in the opening and cleaning process; forming a sliver in the carding process; forming a crepe from the sliver through two drawing processes; forming a roving from the crepe through a roving process; forming a fine yarn from the roving through a spinning process; and forming a pre-oxidized aramid blended yarn bobbin through a winding process.

[0004] The aforementioned patent has the following problems: the blended yarn has poor strength and is prone to bacterial growth, which leads to corrosion and breakage of the blended yarn. In addition, the excess fibers on the surface of the blended yarn are prone to entanglement, resulting in yarn balls on the surface of the blended yarn, which affects the quality of the blended yarn. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a production process for blended yarns, which solves the problems mentioned in the background art, such as poor strength of existing blended yarns, easy bacterial growth leading to corrosion and breakage, and the tendency of excess fibers on the surface of blended yarns to entangle, resulting in yarn balls on the surface and affecting the quality of the blended yarns.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a production process for blended yarn, wherein pre-oxidized yarn, flame-retardant rayon, and polyester fiber are spun sequentially through a cotton cleaning machine, a carding machine, a yarn separating machine, a drawing frame, a roving frame, a spinning frame, and a winding machine to produce blended yarn; the raw material mass ratio of the blended yarn is: 30-40% pre-oxidized yarn, 25-35% polyester fiber, and 30-40% flame-retardant rayon.

[0007] A wire splitting device includes a wire splitting frame, a wire pressing mechanism, a deburring mechanism, a wire gathering frame, and wire splitting rollers. The wire splitting frame is provided with the wire pressing mechanism and the deburring mechanism, and the wire gathering frame is arranged parallel to the central axis of the wire splitting frame. The wire gathering frame is provided with a plurality of wire splitting rollers symmetrically distributed about the central axis of the wire gathering frame.

[0008] Optionally, the pressing mechanism includes a chute, a connecting frame, side rollers, a connecting shaft, a pressure roller, a limiting shaft, a lead screw sleeve, an adjusting lead screw, an adjusting gear, a drive gear, and a servo motor. One end of the chute is provided with a connecting frame, and a connecting shaft passes through the connecting frame. There are also several side rollers that are distributed in a circular shape about the connecting shaft and are parallel to each other. Several protrusions are provided on the side rollers and are integrally fixed to the side rollers. The other end of the chute is provided with a pressure roller that is parallel to the connecting frame.

[0009] Optionally, the end of the pressure roller is connected to a lead screw sleeve, an adjusting lead screw is inserted inside the lead screw sleeve, the input end of the adjusting lead screw is connected to an adjusting gear and a drive gear meshing with the adjusting gear, the input end of the drive gear is connected to a servo motor, the servo motor drives the adjusting lead screw to rotate through the cooperation of the drive gear and the adjusting gear, and the adjusting lead screw is connected to the lead screw sleeve by a threaded pair, and the lead screw sleeve is connected to the pressure roller through a limiting shaft.

[0010] Optionally, the deburring mechanism includes a limiting frame, side rollers, side plates, connecting springs, positioning pins, positioning gears, air pipes, heating chambers, sleeves, return springs, and positioning rods. The limiting frame has two sets of parallel side rollers at both ends, two in each set. The limiting frame has side plates symmetrically distributed about the central axis of the limiting frame. A connecting spring is provided at the connection between the limiting frame and the side plates, and a positioning pin passes through the connecting spring.

[0011] Optionally, the limiting frame is provided with a hollow positioning pin. One end of the positioning pin is connected to the limiting frame, and the other end of the positioning pin is connected to an air pipe. The end of the air pipe away from the positioning pin is connected to a heating chamber, and the heating chamber is connected to the positioning pin through the air pipe.

[0012] Optionally, the positioning pin is fitted with a positioning gear fixedly connected to the positioning pin, the positioning gear is fitted with a sleeve, the sleeve is fitted with a return spring, the return spring is fitted with a positioning rod, the positioning gear is engaged with the positioning rod, and the positioning rod is connected to the sleeve through the return spring.

[0013] Optionally, the hub frame has a funnel-shaped structure, and the hub frame is movably connected to the splitting roller.

[0014] Optionally, the production process of the blended yarn includes the following steps:

[0015] S1. Pre-treated pre-oxidized yarn, flame-retardant rayon and polyester fiber, and produced into pre-made lines by cotton cleaning machine and carding machine;

[0016] S2. The pre-made yarn is introduced into the drawing frame through the splitting equipment to produce pre-made blended yarn. The servo motor drives the adjusting screw to rotate through the cooperation of the drive gear and the adjusting gear. The adjusting screw is connected to the pressure roller through the screw sleeve and the limiting shaft, pushing the pressure roller to move along the central axis of the slide groove. The pressure roller and the connecting frame are adjusted to a suitable distance. The pre-made yarn is pulled by the drawing frame. The pressure roller and the side roller apply pressure to the pre-made yarn, making the pre-made yarn more compact and flat. Then, the limiting frame is adjusted to a suitable angle through the positioning pin, and the positioning rod is pushed to move along the central axis of the sleeve through the return spring until the positioning rod meshes with the positioning gear, limiting the position of the limiting frame. At the same time, three pre-made yarns are led out from the inside of the drawing frame and pre-processed for the drawing frame.

[0017] S3. The pre-made blended yarn drawn from the drawing frame is then spun into blended yarn through a roving frame, a spinning frame, and a winding machine.

[0018] This invention provides a production process for blended yarns, which has the following beneficial effects:

[0019] 1. The production process of this blended yarn includes a pressing mechanism. The pressing roller moves along the central axis of the chute via a limiting shaft, which can change the distance between the pressing roller and the connecting frame, and adjust the distance between them to a suitable level. Pre-formed yarn can be inserted between the pressing roller and the connecting frame, and a pulling force is applied to the pre-formed yarn. The pre-formed yarn exerts friction on the pressing roller and side roller, causing the friction surfaces of the pressing roller and side roller to act on the pre-formed yarn, thus effectively improving the compactness and flatness of the pre-formed yarn. The servo motor effectively drives the adjusting screw to rotate through the cooperation of the drive gear and the adjusting gear. The adjusting screw is connected to the pressing roller via a screw sleeve and a limiting shaft, thereby pushing the pressing roller to move along the central axis of the chute and adjusting the distance between the pressing roller and the connecting frame, effectively adapting to the width of the pre-formed yarn.

[0020] 2. The production process of this blended yarn includes a deburring mechanism. Friction between the pre-formed yarn and the side plate effectively removes excess lint from the surface of the pre-formed yarn. The side plate can be adjusted to its initial state via a connecting spring and positioning pin, allowing for continuous lint removal. The heating chamber introduces high-temperature gas into the limiting frame through a pipe and positioning pin, sterilizing the pre-formed yarn and effectively reducing its moisture content, thus providing a drying process. Side rollers at both ends of the limiting frame further contribute to the drying process. It can effectively limit the position of prefabricated lines and effectively separate the prefabricated lines from the limiting frame at a certain distance. It can effectively reduce the wear of the prefabricated lines and maintain the smooth movement of the prefabricated lines, avoiding the prefabricated lines from getting tangled and affecting the processing effect of the prefabricated lines. The limiting frame can be rotated by the positioning pin and can be adjusted to a suitable angle so that the limiting frame can adapt to the traction of the prefabricated lines. The positioning pin is pushed along the central axis of the sleeve by the return spring until the positioning pin meshes with the positioning gear, thereby limiting the position of the limiting frame. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0023] Figure 3 For the present invention Figure 1 A magnified view of the structure at point A in the middle;

[0024] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at point B in the middle;

[0025] Figure 5 This is a schematic diagram of the internal structure of the limiting frame of the present invention;

[0026] Figure 6 For the present invention Figure 2 A magnified schematic diagram of the structure at point C.

[0027] In the diagram: 1. Separating frame; 2. Pressing mechanism; 201. Slide groove; 202. Connecting frame; 203. Side roller one; 204. Connecting shaft; 205. Pressing roller; 206. Limiting shaft; 207. Lead screw sleeve; 208. Adjusting lead screw; 209. Adjusting gear; 210. Drive gear; 211. Servo motor; 3. Deburring mechanism; 301. Limiting frame; 302. Side roller two; 303. Side plate; 304. Connecting spring; 305. Positioning pin; 306. Positioning gear; 307. Air pipe; 308. Heating chamber; 309. Sleeve; 310. Return spring; 311. Positioning rod; 4. Wire gathering frame; 5. Separating roller. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Please see Figures 1 to 6 The present invention provides a technical solution: a production process for blended yarn, wherein pre-oxidized yarn, flame-retardant rayon and polyester fiber are spun into blended yarn by sequentially passing through a cotton cleaning machine, a carding machine, a yarn separating equipment, a drawing frame, a roving frame, a spinning frame and a winding machine; the raw material mass ratio of the blended yarn is: 30-40% pre-oxidized yarn, 25-35% polyester fiber and 30-40% flame-retardant rayon.

[0032] A wire separating device includes a wire separating frame 1, a wire pressing mechanism 2, a deburring mechanism 3, a wire gathering frame 4, and wire separating rollers 5. The wire separating frame 1 is provided with the wire pressing mechanism 2 and the deburring mechanism 3, and the wire gathering frame 4 is arranged parallel to the central axis of the wire separating frame 1. The wire gathering frame 4 is provided with a plurality of wire separating rollers 5 symmetrically distributed about the central axis of the wire gathering frame 4.

[0033] In this invention, the pressing mechanism 2 includes a slide groove 201, a connecting frame 202, side rollers 203, a connecting shaft 204, a pressure roller 205, a limiting shaft 206, a lead screw sleeve 207, an adjusting lead screw 208, an adjusting gear 209, a drive gear 210, and a servo motor 211. One end of the slide groove 201 is provided with the connecting frame 202, through which the connecting shaft 204 passes, and several side rollers 203 are arranged in a circular pattern and parallel to each other about the connecting shaft 204. Several protrusions are integrally fixed to the side rollers 203. The other end of the slide groove 201 is provided with a pressure roller 205 arranged parallel to the connecting frame 202. 05; Moving the pressure roller 205 along the central axis of the slide groove 201 via the limiting shaft 206 can change the distance between the pressure roller 205 and the connecting frame 202, and can adjust the distance between the pressure roller 205 and the connecting frame 202 to a suitable distance. The preformed line can be inserted between the pressure roller 205 and the connecting frame 202, and a pulling force can be applied to the preformed line. The preformed line applies friction to the pressure roller 205 and the side roller 203, so that the friction surfaces of the pressure roller 205 and the side roller 203 act on the preformed line, so that the pressure roller 205 and the side roller 203 apply pressure to the preformed line, thereby effectively improving the compactness and flatness of the preformed line.

[0034] In this invention: a lead screw sleeve 207 is connected to the end of the pressure roller 205; an adjusting lead screw 208 is inserted inside the lead screw sleeve 207; an adjusting gear 209 is connected to the input end of the adjusting lead screw 208; and a drive gear 210 meshes with the adjusting gear 209. A servo motor 211 is connected to the input end of the drive gear 210; the servo motor 211 drives the adjusting lead screw 208 to rotate through the cooperation of the drive gear 210 and the adjusting gear 209; and the adjusting lead screw 208 is threadedly connected to the lead screw sleeve 207. The rod sleeve plate 207 is connected to the pressure roller 205 through the limiting shaft 206. Under the action of the servo motor 211, the adjusting screw 208 can be effectively driven to rotate through the cooperation of the drive gear 210 and the adjusting gear 209. The adjusting screw 208 is connected to the pressure roller 205 through the screw sleeve plate 207 and the limiting shaft 206, thereby pushing the pressure roller 205 to move along the central axis of the slide groove 201 and adjusting the distance between the pressure roller 205 and the connecting frame 202, which can effectively adapt to the width of the prefabricated lines.

[0035] In this invention, the deburring mechanism 3 includes a limiting frame 301, side rollers 302, side plates 303, connecting springs 304, positioning pins 305, positioning gears 306, air pipes 307, heating chambers 308, sleeves 309, return springs 310, and positioning rods 311. Two sets of parallel side rollers 302 are provided at both ends of the limiting frame 301, two in each set. Side plates 303 are symmetrically distributed about the central axis of the limiting frame 301 within the limiting frame 301. A connecting spring 304 is provided at the connection between the limiting frame 301 and the side plates 303, and a positioning pin passes through the connecting spring 304. Friction occurs between the pre-formed lines and the side plates 303, allowing the side plates 303 to effectively clean excess lint from the surface of the pre-formed lines. Furthermore, the cooperation of the connecting springs 304 and the positioning pins allows the side plates 303 to be adjusted to their initial state, enabling them to continuously remove excess lint from the surface of the pre-formed lines.

[0036] In this invention: a hollow positioning pin 305 is provided on the limiting frame 301. One end of the positioning pin 305 is connected to the limiting frame 301, and the other end of the positioning pin 305 is connected to an air pipe 307. The end of the air pipe 307 away from the positioning pin 305 is connected to a heating chamber 308. The heating chamber 308 is connected to the positioning pin 305 through the air pipe 307. The heating chamber 308 introduces high-temperature gas into the interior of the limiting frame 301 through the cooperation of the air pipe 307 and the positioning pin 305, so that the high-temperature gas can sterilize the prefabricated lines at high temperature and effectively reduce the moisture carried by the prefabricated lines, providing a drying treatment for the prefabricated lines.

[0037] In this invention: a positioning gear 306 is fixedly connected to the positioning pin 305, and a sleeve 309 is provided on the positioning gear 306. A return spring 310 is provided inside the sleeve 309, and a positioning rod 311 passes through the return spring 310. The positioning gear 306 and the positioning rod 311 are meshed and connected, and the positioning rod 311 is connected to the sleeve 309 through the return spring 310. The side rollers 302 at both ends of the limiting frame 301 can effectively limit the position of the prefabricated lines and effectively separate the prefabricated lines from the limiting frame 301. A certain spacing can effectively reduce wear on the precast lines and maintain smooth movement of the precast lines, preventing them from tangling and affecting the processing effect. The limiting frame 301 can be rotated by the positioning pin 305 and can be adjusted to a suitable angle so that the limiting frame 301 can adapt to the traction of the precast lines. The return spring 310 pushes the positioning rod 311 to move along the central axis of the sleeve 309 until the positioning rod 311 meshes with the positioning gear 306, thereby limiting the position of the limiting frame 301.

[0038] In this invention: the wire gathering frame 4 has a funnel-shaped structure, and the wire gathering frame 4 is movably connected to the wire separating roller 5; three pre-made lines are drawn out from the inside of the wire gathering frame 4, and the three pre-made lines are separated by a certain distance through the wire separating roller 5 to avoid the pre-made lines from tangling with each other, and to provide pre-treatment for the drawing machine.

[0039] A process for producing blended yarn includes the following steps:

[0040] S1. Pre-treated pre-oxidized yarn, flame-retardant rayon and polyester fiber, and produced into pre-made lines by cotton cleaning machine and carding machine;

[0041] S2. The pre-made yarn is fed into the drawing frame through the splitting device to produce pre-made blended yarn. The servo motor 211 drives the adjusting screw 208 to rotate via the engagement of the drive gear 210 and the adjusting gear 209. The adjusting screw 208 is connected to the pressure roller 205 via the screw sleeve 207 and the limiting shaft 206, pushing the pressure roller 205 to move along the central axis of the chute 201. The distance between the pressure roller 205 and the connecting frame 202 is adjusted to a suitable level. The pre-made yarn is stretched by the drawing frame. The pressure roller 205 and the side roller 203 apply pressure to the preformed lines, making the preformed lines more compact and flat. Then, the limiting frame 301 is adjusted to a suitable angle by the positioning pin 305, and the positioning rod 311 is pushed along the central axis of the sleeve 309 by the return spring 310 until the positioning rod 311 meshes with the positioning gear 306, limiting the position of the limiting frame 301. At the same time, the three preformed lines are led out from the inside of the wire frame 4, and pre-treatment is provided for the drawing frame.

[0042] S3. The pre-made blended yarn drawn from the drawing frame is then spun into blended yarn through a roving frame, a spinning frame, and a winding machine.

[0043] In summary, the production process of this blended yarn involves sequentially spinning pre-oxidized yarn, flame-retardant rayon, and polyester fiber through a cotton cleaner, carder, yarn separator, drawing frame, roving frame, spinning frame, and winding machine to produce the blended yarn. Specifically, a servo motor 211 drives an adjusting screw 208 to rotate via a drive gear 210 and an adjusting gear 209. The adjusting screw 208 is connected to a pressure roller 205 via a screw sleeve 207 and a limiting shaft 206, pushing the pressure roller 205 to move along the central axis of the chute 201. The pressure roller 205 is also connected to the connecting frame 202. The spacing is adjusted to a suitable level, and the pre-formed lines are pulled by the drawing frame. The pressure roller 205 and the side roller 203 apply pressure to the pre-formed lines, making them more compact and flat. Then, the limiting frame 301 is adjusted to a suitable angle by the positioning pin 305, and the positioning rod 311 is pushed along the central axis of the sleeve 309 by the return spring 310 until the positioning rod 311 meshes with the positioning gear 306, limiting the position of the limiting frame 301. At the same time, the three pre-formed lines are drawn out from the inside of the wire frame 4, and pre-processing is provided for the drawing frame.

[0044] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A production process for blended yarn, characterized in that, Pre-oxidized yarn, flame-retardant rayon, and polyester fiber are spun sequentially through a cotton cleaning machine, a carding machine, a yarn separating device, a drawing frame, a roving frame, a spinning frame, and a winding machine to produce a blended yarn. The raw material mass ratio of the blended yarn is: 30-40% pre-oxidized yarn, 25-35% polyester fiber, and 30-40% flame-retardant rayon. The yarn separating device includes a yarn separating frame (1), a yarn pressing mechanism (2), a deburring mechanism (3), a yarn gathering frame (4), and a yarn separating roller (5). The yarn separating frame (1) is equipped with the yarn pressing mechanism (2) and the deburring mechanism (3), and the yarn gathering frame (4) is arranged parallel to the central axis of the yarn separating frame (1). (4) It is provided with several dividing rollers (5) symmetrically distributed about the central axis of the wire-gathering frame (4); the deburring mechanism (3) includes a limiting frame (301), side rollers (302), side plate (303), connecting spring (304), positioning pin (305), positioning gear (306), air pipe (307), heating chamber (308), sleeve (309), return spring (310) and positioning rod (311). The two ends of the limiting frame (301) are provided with two sets of parallel side rollers (302), two in each set. The limiting frame (301) is provided with several dividing rollers (5) symmetrically distributed about the central axis of the wire-gathering frame (4); the deburring mechanism (3) includes a limiting frame (301), side rollers (302), side plate (303), connecting spring (304), positioning pin (305), positioning gear (306), air pipe (307), heating chamber (308), sleeve (309), return spring (310) and positioning rod (311). The limiting frame (301) is provided with two sets of parallel side rollers (302) at both ends, two in each set. The limiting frame (301) is provided with several dividing rollers (5) symmetrically distributed about the central axis of the wire-gathering frame (304). 1) Side plates (303) symmetrically distributed along the central axis. A connecting spring (304) is provided at the connection between the limiting frame (301) and the side plate (303). A positioning pin is inserted inside the connecting spring (304). A positioning pin (305) with a hollow structure is provided on the limiting frame (301). One end of the positioning pin (305) is connected to the limiting frame (301), and the other end of the positioning pin (305) is connected to an air pipe (307). The end of the air pipe (307) away from the positioning pin (305) is connected to a heating chamber (308). The heating chamber (308) is connected to the air pipe (307). The positioning pin (305) is connected to the positioning pin (305). The positioning pin (305) is fitted with a positioning gear (306) which is fixedly connected to the positioning pin (305). The positioning gear (306) is fitted with a sleeve (309). The sleeve (309) is fitted with a return spring (310). The return spring (310) is fitted with a positioning rod (311). The positioning gear (306) is meshed with the positioning rod (311). The positioning rod (311) is connected to the sleeve (309) through the return spring (310). The limiting frame (301) can be rotated through the positioning pin (305).

2. The production process of blended yarn according to claim 1, characterized in that: The pressing mechanism (2) includes a chute (201), a connecting frame (202), a side roller (203), a connecting shaft (204), a pressure roller (205), a limiting shaft (206), a lead screw sleeve (207), an adjusting lead screw (208), an adjusting gear (209), a drive gear (210), and a servo motor (211). One end of the chute (201) is provided with a connecting frame (202). The connecting frame (202) is provided with a connecting shaft (204) and several side rollers (203) that are arranged in a circular shape and parallel to each other about the connecting shaft (204). Several protrusions are provided on the side rollers (203) that are integrally fixed with the side rollers (203). The other end of the chute (201) is provided with a pressure roller (205) that is parallel to the connecting frame (202).

3. The production process of blended yarn according to claim 2, characterized in that: The end of the pressure roller (205) is connected to a lead screw sleeve (207), and an adjusting lead screw (208) is inserted inside the lead screw sleeve (207). The input end of the adjusting lead screw (208) is connected to an adjusting gear (209) and a drive gear (210) meshing with the adjusting gear (209). The input end of the drive gear (210) is connected to a servo motor (211). The servo motor (211) drives the adjusting lead screw (208) to rotate through the cooperation of the drive gear (210) and the adjusting gear (209). The adjusting lead screw (208) is connected to the lead screw sleeve (207) by a threaded pair, and the lead screw sleeve (207) is connected to the pressure roller (205) through a limiting shaft (206).

4. The production process of blended yarn according to claim 1, characterized in that: The wire gathering frame (4) has a funnel-shaped structure and is movably connected to the wire separating roller (5).

5. A production process for blended yarn according to any one of claims 1-4, comprising the following steps: S1. Pre-treated pre-oxidized yarn, flame-retardant rayon and polyester fiber, and produced into pre-made lines by cotton cleaning machine and carding machine; S2. The prefabricated yarn is fed through the splitting device into the drawing frame to produce prefabricated blended yarn. The servo motor (211) drives the adjusting screw (208) to rotate through the cooperation of the drive gear (210) and the adjusting gear (209). The adjusting screw (208) is connected to the pressure roller (205) through the screw sleeve (207) and the limiting shaft (206), pushing the pressure roller (205) to move along the central axis of the slide groove (201). The pressure roller (205) and the connecting frame (202) are adjusted to a suitable distance. The prefabricated yarn is subjected to... The drawing frame pulls the preformed lines, and the pressure roller (205) and side roller (203) apply pressure to the preformed lines, making the preformed lines more compact and flat. Then, the limiting frame (301) is adjusted to a suitable angle by the positioning pin (305), and the positioning rod (311) is pushed to move along the central axis of the sleeve (309) by the return spring (310) until the positioning rod (311) meshes with the positioning gear (306), restricting the position of the limiting frame (301), while the three preformed lines are led out from the inside of the wire-gathering frame (4). S3. The pre-made blended yarn drawn from the drawing frame is then spun into blended yarn through a roving frame, a spinning frame, and a winding machine.

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