43results about "Artificial filament support" patented technology

This application belongs to the technical field of drying and setting equipment, and discloses a uniform heat drying and setting device for polyester yarn. It includes a box body, a column installed on the bottom of the box body, a first fixed plate and a second fixed plate respectively disposed on both sides of the box body, a feed roller disposed on the first fixed plate, a take-up roller disposed on the second fixed plate, a hot air blower disposed on the box body, an air duct connected to the hot air blower, and a heating plate disposed inside the box body. A placement groove is formed on the side wall of the box body, and a sealing groove is formed on the inner top wall of the placement groove. A baffle plate is slidably disposed within the sealing groove, and a fixing component is provided on the baffle plate for fixing the baffle plate. This application effectively reduces the difficulty for workers to pass polyester yarn through both sides of the box body.

The invention relates to a spinning stretching device, which can restrain air flow in a heat preservation box from becoming uneven in the axial direction of a heating roller under the condition that a plate-shaped component is arranged in the heat preservation box of the spinning stretching device. A plate-like member (41) is provided which protrudes forward from the rear surface of the incubator, the front surface of which serves as the door section (27), and which is disposed so as to be separated from the door section (27) in a closed state. A gap between the front end of the plate-shaped component (41) and the door part (27) in the closed state is blocked by a sealing component (61). As a result, the air flow in the axial direction (front-rear direction) of the heating roller can be prevented from becoming uneven.

The invention relates to the technical field of para-aramid fiber production, in particular to a high-strength para-aramid fiber production device and process. A high-strength para-aramid fiber production device comprises a rack, a U-shaped yarn guide frame with a forward opening is arranged at the front end of the rack, a sealing cover is arranged at the top end of the rack in an up-down rotating mode, the yarn guide frame and the sealing cover can define a closed drafting cavity, the yarn guide frame comprises a rear plate connected with the rack, and side plates are arranged on the left side and the right side of the rear plate respectively. A comb-shaped yarn guiding opening is formed in the upper end face of the side plate, a hot tension roller set is arranged in the drafting cavity, a second motor for driving the hot tension roller set to rotate is arranged at the rear end of the rack, and a heating plate is arranged on the sealing cover. The high-strength para-aramid fiber production device is convenient to operate, good in heating stability and good in drafting effect, and the high-strength para-aramid fiber is finally obtained in cooperation with the para-aramid fiber production technology of two times of drafting.

The arrangement (100) includes a transfer device (101) for receiving material (102) from a material output (104) to an input area (103) of the transfer device and for transferring the material in a first direction (107) in a plurality of lines (105A, 105B, 105C) from the input area (103) to an output area (106) of the transfer device. The material is heated (108) to dry the material during transfer. The configuration includes a coolant supply device (109) for providing coolant (119) to at least one first portion (110) of at least one first line (105A) of the transfer device, wherein the one first portion (110) of the one first line (105A) is free of material or has less material than at least one second portion (111) of the at least one first line (105A) or at least one second line (105B) in order to control the temperature profile of the transfer device (110) in a predetermined manner.

The invention discloses a short fiber continuous production line capable of switching processes in the technical field of spinning short fiber processing, which comprises a feeding frame, a yarn guide frame, a water bath pool, a steam box, a conveying belt, a swinging hopper, a swinging vehicle, a feeder and a yarn cutter, so that a complete production line capable of processing short fibers is formed, and tows are used as raw materials and are directly drawn and stretched, so that the short fibers can be processed. A plurality of tows are uniformly drawn and stranded, the tows are bundled and spread into flat sheet-shaped filaments, then the flat sheet-shaped filaments are conveyed and soaked, meanwhile, a steam box and a crimping machine are additionally arranged for processing, finally, the tows subjected to secondary processing are dried, finally, the flattened and dried tows are stretched, and finally, the tows are cut off through a shredding machine. In addition, according to different tows, production lines do not need to be replaced, the device can directly switch production processes according to different types of tows, and adjustment is flexible and convenient.

The application discloses a polyacrylonitrile dry-jet wet spinning original filament coagulation forming production conveying device and method, and particularly relates to the polyacrylonitrile production technical field, and comprises a coagulation bath tank, a guide roller is rotatably installed at one side of the top of the coagulation bath tank; a first conveying mechanism is installed at the bottom of the coagulation bath tank and at one side of the guide roller, and the original filament bundle is limited in the coagulation bath tank through the first conveying mechanism to complete coagulation. The original filament bundle is actively rotated and guided and limited in the coagulation bath tank through the first conveying mechanism, the original filament bundle can be fully contacted with the coagulation liquid in the coagulation bath tank to complete the coagulation operation, power is transmitted to the second conveying mechanism through the linkage mechanism, the first conveying mechanism and the second conveying mechanism form an original filament bundle conveying system, the reciprocating pulling of the coagulated original filament bundle is completed through the second conveying mechanism, and the continuous reciprocating outward pulling of the original filament bundle is completed to complete conveying.

Methods and systems for producing a collagen biopolymer fiber dissolve clinical-grade collagen in an acid solution to form a collagen solution and extrude the collagen solution into a formation buffer bath to form a plurality of sub-fibers at a fiber formation speed. The sub-fibers are combined together to form a starting end of a collagen fiber that is attached to a pulley arm positioned above a horizontal processing facility. The pulley arm feeds the collagen fiber into the horizontal processing facility by moving across the horizontal processing facility at a fiber feeding speed equal to the fiber formation speed.

The utility model discloses spinning production equipment for cationic dyeable polyester pre-oriented yarn, and relates to the technical field of spinning production. Comprising a spinning machine body, the spinning machine body is provided with a winding mechanism used for spinning production of cation dyeable polyester pre-oriented yarn, tows passing through an adjusting assembly enter a winding assembly, a movable block slides on a sliding rod, a protruding block is arranged in the movable block and slides along an annular groove in a reciprocating lead screw, and the movable block can slide along the annular groove in the reciprocating lead screw. The movable block slides along the sliding rod through the reciprocating lead screw, then the movable rod and the wobble wheel are driven to do reciprocating motion, a rubber ring on the edge of the wobble wheel makes contact with a tow, in the reciprocating motion process of the wobble wheel, the tow is evenly wound around the winding shaft, and the limiting rod can limit the position of the tow to a certain degree; the tows are prevented from falling off from the wobble wheel, the problem that the tows are stacked, overlapped or irregularly wound on the winding shaft is solved, and the winding quality and appearance are improved.

The utility model discloses spinning equipment for producing high-moisture-absorption composite fibers, which comprises an equipment main body and a feeding bin arranged at the upper end of the equipment main body, a heating bin is arranged in the equipment main body to heat raw materials, a spinning nozzle is arranged on the lower side of the heating bin to spray out the fused raw materials in a filamentous form, and the feeding bin is arranged in the equipment main body. A yarn guide disc is arranged on the lower side of the spinning nozzle to guide the trend of the silk yarn, a winding roller is arranged on one side of the yarn guide disc to wind the silk yarn, the winding roller and the spiral groove are installed, the spun silk yarn passes through the spiral groove in the winding roller, and if the silk yarn is broken in the winding process, the silk yarn is restrained by the spiral groove, so that the silk yarn is prevented from being broken. The broken end position can be wound by the spiral groove, so that a worker can directly find the broken end position of the silk thread in the winding roller area when finding the broken silk thread, and as the broken silk thread position can be quickly found, the operator can quickly carry out thread continuing operation, the overall production efficiency is improved, and the downtime caused by the broken silk thread is reduced as much as possible.

The invention discloses a simple high polymer fiber wet spinning method based on substrate linear pre-construction and liquid phase interface stripping. The method comprises the following steps: (1) dissolving a high polymer material in an organic solvent, and stirring to obtain a precursor solution; (2) selecting a substrate having a weak adhesion characteristic with the precursor solution obtained in the step (1), and spreading the precursor solution on the surface of the substrate in a linear strip shape to form a linear liquid film; (3) quickly immersing the substrate attached with the linear liquid film into solidification liquid, and solidifying to obtain primary polymer fibers; and (4) carrying out heat treatment on the primary polymer fiber obtained in the step (3) to obtain the polymer fiber. According to the method provided by the invention, the high polymer fiber is rapidly and simply prepared under a mild condition by utilizing the interfacial compatibility difference between the solution and the substrate.

The utility model discloses a yarn guide mechanism of a spinning machine for composite fibers, and relates to the technical field of spinning machines. The yarn guide mechanism of the spinning machine for the composite fibers comprises two groups of yarn guide plates, a cleaning plate and a mounting block; the number of the cleaning plates is two, and cleaning spaces are formed in the opposite faces of the two cleaning plates. A limiting round rod and a U-shaped connecting plate are arranged on the mounting block, and the limiting round rod is used for connecting the U-shaped connecting plate with the mounting block. According to the yarn guide mechanism of the spinning machine for the composite fibers, through the arrangement of the cleaning plate, impurities adhered to the surfaces of the composite fiber yarns can be cleaned when the composite fiber yarns are conveyed, so that the situation that the impurities adhered to the composite fiber yarns affect subsequent processing of the composite fiber yarns can be avoided, and the practicability of the device can be improved; and through the arrangement of the U-shaped connecting plate, the two groups of wire guide plates can be connected, so that the connecting mode is relatively simple, the operation of workers is facilitated, and the practicability of the device is improved.

The invention provides a multi-spindle-position spinning device with an anti-winding structure, which comprises a supporting seat, a spinning mechanism, an anti-winding mechanism and a tensioning assembly, the supporting seat comprises a transverse bottom plate and a vertical supporting frame fixedly connected to one end of the transverse bottom plate, the spinning mechanism comprises a wire outlet assembly and a wire winding assembly, and the anti-winding mechanism is arranged on the transverse bottom plate. The vertical supporting frame is installed on the transverse bottom plate, the wire outlet assembly is installed on the vertical supporting frame, the wire winding assembly is installed on the transverse bottom plate, the anti-winding mechanism is installed on the transverse bottom plate and comprises a second supporting plate, and a position adjusting assembly is arranged between the second supporting plate and the transverse bottom plate. By means of the spinning device, it can be ensured that the spinning path is stable, mutual winding of multi-spindle spinning is avoided, winding is finally completed through the silk spindles, and the efficient spinning effect that raw material precise spinning, the stable path and winding are finally avoided is achieved.

The invention discloses a yarn guide device based on distributed sensing and self-adaptive intelligent regulation and control and a tension monitoring system, relates to the technical field of chemical fiber manufacturing, and is suitable for high-speed spinning production of POY (pre-oriented yarn), FDY (fully drawn yarn) and the like. Aiming at the defects of monitoring lag, large error and dependence on manpower in the prior art, the system comprises a guide wire device body and an intelligent monitoring regulation and control system: the guide wire device body takes an aluminum oxide-silicon carbide composite ceramic substrate as a substrate, and an FBG distributed sensing array is integrated to realize tension in-situ high-precision detection (the error is less than or equal to + / -0.5%); the intelligent monitoring regulation and control system recognizes eight types of working conditions based on transfer learning and a self-adaptive SVM model through multi-parameter acquisition and feature fusion extraction, is integrated with a PLC system to complete automatic regulation and control of abnormity, and is assisted by graded alarm and 24-hour self-calibration functions. The full-process intelligent closed loop of the spinning tension is realized, the fiber quality consistency and the production efficiency are improved, the energy consumption and the maintenance cost are reduced, and the method is adaptive to the global monitoring of a multi-spindle production line.

This utility model relates to the technical field of woven bag processing equipment, specifically disclosing a drawing device for processing plastic woven bags, including a base and a cooling and drying mechanism. The cooling and drying mechanism is arranged above the base, and a tensioning and winding mechanism is arranged on one side of the cooling and drying mechanism. The cooling and drying mechanism includes a box, and a partition is connected inside the box. The two sides of the partition are a cooling chamber and a drying chamber, respectively. A top plate and a support are arranged above the cooling chamber and the drying chamber, respectively. Two connecting pipes are symmetrically connected to the top of the inner side of the support, and a hot air fan is connected above the connecting pipes. The tensioning and winding mechanism includes a U-shaped frame, and a first telescopic rod is connected to the lower middle of the U-shaped frame. A vertical plate is arranged on the side of the first telescopic rod away from the box, and a second telescopic rod is connected to the lower side of the vertical plate away from the winding shaft. This device has a drawing and drying function, which can prevent residual water droplets on the drawing from falling to the ground and ensure the cleanliness of the drawing operation environment.

Apparatus (1) for producing a nonwoven fabric comprising a spinneret (2) and a mechanical drawing device (5) which comprises primary rollers and secondary rollers (21, 22) which are constrained to a frame (50) such that, considering a condition of use, said secondary rollers (21, 22) are movable with respect to said primary rollers (11, 12, 13) between a first position of operational disengagement from said filaments (3), and a second drawing position of said filaments (3).

The invention relates to the technical field of fiber production, and discloses a flame cotton fiber production filament dividing-filament arranging-carding integrated device which comprises a filament arranging box and a net-shaped conveying belt arranged on the inner side of the filament arranging box, one end of the filament arranging box is provided with a carding machine, and the upper portion of the other end of the filament arranging box is communicated with a filament dividing box; a pair of feeding rollers is arranged at the upper end of the inner side of the yarn separating box, and a yarn separating needle roller is arranged below the feeding rollers; an adsorption mechanism is arranged in the filament arranging box and comprises an adsorption box arranged on the inner side of the net-shaped conveying belt, a draught fan is arranged on one side of the filament arranging box, and an air inlet of the draught fan communicates with the adsorption box. According to the device, the flame cotton fibers subjected to filament separation can be dried under the action of the drying mechanism, the problem of continuous adhesion of the fibers caused by moisture or colloid can be solved, then the fibers carry the same charges under the action of the discharging mechanism, and the fibers can be thoroughly disassembled into more dispersed units through charge repulsive force; the fibers are uniformly laid in the preset direction, and local gathering is avoided.

The invention discloses a high-mechanical-property low-melting-point polyamide POY fiber and a preparation method thereof, and belongs to the technical field of chemical fiber manufacturing. The POY fibers are prepared by compounding low-melting-point polyamide fibers with different melting points and conventional polyamide fibers, and the method comprises the following steps: melting dried low-melting-point polyamide slices and conventional polyamide slices through two independent screw extruders, and extruding through a parallel composite spinning assembly to form parallel nascent fibers; and winding to obtain a pre-oriented yarn (POY). The average breaking strength of the prepared polyamide POY fiber with high mechanical property and low melting point is 3.37 cN / dtex, and the average elongation at break is 41.56%. The method effectively solves the problems of many broken ends, many broken filaments, poor spinnability, low breaking strength and the like caused by high heat sensitivity and poor melt strength in the spinning process of low-melting-point polyamide, and the prepared fiber has high mechanical property, meets the requirement of subsequent processing on the mechanical strength of the fiber, and is suitable for the fields of non-woven fabrics, composite materials and the like.

The invention discloses an ecological chinlon composite fiber yarn processing technology and equipment, and belongs to the technical field of ecological chinlon composite fiber yarns. Aiming at the problems of easy deviation and winding during fiber conveying, complex take-out of a wind-up roller, inconvenience in fiber feeding and the like of existing equipment, a conveying assembly of the equipment is flexible in guiding, the position of a limiting guide wheel can be quickly adjusted by rotating an adjusting screw to adapt to different numbers of fibers, and the limiting guide wheel can be integrally moved upwards to facilitate feeding; the winding assembly is convenient to operate, braking can be relieved by starting a first servo motor, and after a sliding supporting frame is transversely moved, a protective cover is opened, and a winding roller is taken out; and winding driving is stable, and a second servo motor is started to drive a winding roller to rotate. And due to the design of the winding assembly, the winding roller can be taken out and installed more easily and conveniently, and the guide assembly has high flexibility. The U-shaped pushing block is driven to transversely move by rotating the adjusting screw, clamping on the sliding transverse plates can be relieved, the two sliding transverse plates are made to be away from each other under the action of the tension spring, and then the limiting round rod is moved out of the limiting round hole.

The utility model discloses a feeding stopping device capable of automatically stopping production of polyester-nylon composite superfine fibers. The feeding stopping device comprises a feeding stopping frame, an energy consumption braking mechanism and a driving mechanism. Guide cylinders are respectively arranged on the left side and the right side of the feeding stopping frame; the energy consumption braking mechanism comprises sliding grooves, sliding blocks, fixing seats, an ejector rod, a distance adjusting frame, a part mounting frame and a wire guide roller, the sliding grooves are formed in the upper surface of the feeding stopping frame, the sliding blocks are slidably connected into the four sliding grooves respectively, the upper surfaces and the lower surfaces of the four sliding blocks are fixedly connected with the fixing seats respectively, and the ejector rod is arranged on the ejector rod. The interiors of the eight fixing seats are rotationally connected with ejector rods correspondingly, the upper ends of the four ejector rods on the upper side and the lower ends of the four ejector rods on the lower side are rotationally connected with a distance adjusting frame correspondingly, and the feeding stopping device for automatic stopping of polyester and nylon composite superfine fiber production is good in braking effect and does not break polyester and nylon composite superfine fibers in the braking process.

The utility model discloses a drafting device for producing chemical fibers of non-woven products, which comprises a bottom plate and a tensioning frame, one side of the top of the bottom plate is connected with a traction frame, two groups of rollers are rotatably connected in the traction frame through bearings, the other side of the top of the bottom plate is connected with a rolling frame, and a heating component is arranged between the rolling frame and the traction frame. An external motor is started to work to drive the winding drum to rotate to wind chemical fibers, the chemical fibers are drafted under winding pulling of the winding drum, after heat emitted by the heating plate is absorbed by the hot roller, the heat is transferred to the chemical fibers when the hot roller makes contact with the chemical fibers, and therefore the chemical fibers are heated, drafting stress is reduced, and the chemical fibers are drafted. When the chemical fibers are heated by the heating roller, the chemical fibers are softened and easily drafted, redundant heat emitted by the heating plate can be dissipated into the heating box when not absorbed by the heating roller, heat preservation is carried out through the heat preservation pad arranged in the heating box, heat loss is effectively reduced, more heat is concentrated on the heating roller and the heating of the chemical fibers, and the heating efficiency is improved.

A process is disclosed for producing fibers and films from biodegradable polymers. The polymer composition used to form the fibers and films, for instance, can contain a polyhydroxyalkanoate polymer. In accordance with the present disclosure, during formation of the fiber and film, the fiber and film is fed into an accumulation zone that promotes crystallization of the biodegradable polymer for increasing strength and improving the processability of the article.

The invention discloses a glass filament dividing device for wet spinning of acrylic fiber filaments, and belongs to the technical field of acrylic fiber spinning and filament dividing, the glass filament dividing device comprises a spinning head, a spinning box, a coagulating tank and a controller on one side of the coagulating tank, the coagulating tank is of a box body structure with an open top, the spinning box is fixedly installed on one side of the coagulating tank, and the controller is arranged on the other side of the coagulating tank. The coagulating tank is located on the side, away from the spinning heads, of the spinning box, the spinning heads are fixedly installed on the side, away from the coagulating tank, of the spinning box, multiple sets of spinning heads are arranged, multiple sets of clamping grooves are formed in the inner bottom end of the coagulating tank, each set of clamping grooves are distributed in a splayed structure, and glass partition plates are slidably connected into each set of clamping grooves. According to the acrylic filament separating device, the liquid level and the flow speed can be detected and adjusted in the acrylic filament separating process, and the stability of filaments in the filament separating process is guaranteed.

Provided is a spinning draft device that includes a spinning draft section (6) that drafts a plurality of spun yarns (100) spun from a spinning machine to stretch them, a plurality of yarn suction sections (4, 4A-4L), and a winding section (8) that winds the plurality of spun yarns delivered from the spinning draft section to form a wound package. The spinning draft section includes a first guide section (10) that changes the traveling direction for each of the plurality of spun yarns, a stretching section (28, 28A) that includes a plurality of rollers for stretching the plurality of spun yarns, and a second guide section (70) that guides the plurality of spun yarns to the winding section. The winding section and the stretching section are horizontally arranged, the first guide section is arranged at a position higher than at least one of the rollers of the stretching section, and a first yarn delivery roller (20) is arranged in the yarn passage from the first guide section to the stretching section. The first yarn delivery roller is arranged at a position lower than the yarn suction section and is offset in the horizontal direction with respect to the first guide section and the stretching section.

This invention involves a new and better solution to the problems associated with the premature softening of PLA filaments in the additive manufacturing of three dimensional articles. It is based upon the finding that poly(lactic acid) filaments with high crystallinity offer much better resistance to heat-induced softening. The crystalline poly(lactic acid) filament of this invention can accordingly be used in the additive manufacturing of three dimensional articles without encountering the problems associated with premature softening, such as poor quality and printer jamming The crystalline poly(lactic acid) filaments of this invention can also be used in additive manufacturing of three dimensional articles without compromising the quality of the ultimate product, reducing printing speed, increasing cost, or leading to increased printer complexity. This invention more specifically discloses a filament for use in three-dimensional printing which is comprised of crystalized poly(lactic acid), wherein said filament has a diameter which is within the range of 1.65 mm to 1.85 mm.

The application discloses a kind of polycarbosilane continuous melt spinning solidification preparation equipment and preparation process, and the application relates to spinning processing technical field.Through the middle temperature zone, low temperature zone, cooling zone sequentially connected in solidification pool, three-stage gradient cooling solidification system is constructed, based on the phase change characteristics of polycarbosilane melt design progressive solidification path, cooperate independent closed loop temperature control, completely avoid the internal stress concentration caused by melt stream instantaneous cooling, make the stable phase change of filament bundle from viscous flow state to solid state greatly reduce the brittleness of nascent polycarbosilane fiber, effectively reduce the subsequent hair and broken wire phenomenon in the process of bunching, transmission, winding, in combination with the uniform distribution of air micro-pore of inner wall circumferential annular solidification tube, make cooling airflow form full circumferential symmetrical uniform wind field.

The invention provides a spinning tractor and a package manufacturing method, which can inhibit mutual winding of a plurality of monofilaments during manufacturing of mother filaments. A spinning traction device (1) is provided with a traverse yarn guide (22), a fulcrum yarn guide (21), a yarn guide (16), and a bending yarn guide (26). The fulcrum yarn guide (21) is disposed on the upper side of the traverse yarn guide (22) and on the upstream side in the advancing direction of the mother yarn (MY), and extends in the left-right direction (first axial direction). The yarn guide (16) is arranged on the upstream side of the fulcrum yarn guide (21) in the advancing direction. The bending yarn guide (26) is arranged between the yarn guide (16) and the fulcrum yarn guide (21) in the advancing direction. When viewed from the first axial direction, the curved contact surface (26a) of the curved yarn guide (26) is disposed on the same side as the fulcrum yarn guide (21) in the fulcrum normal direction with respect to the fulcrum virtual tangent (VLP) and faces the opposite side to the fulcrum virtual tangent (VLP).

The invention relates to a gravity slide with a volume backflow generator for guiding a synthetic filament, the gravity slide (4) having a guide region (43) for guiding the synthetic filament (F) in a filament running direction (FR) and a volume flow region (44) for guiding a volume flow (V1, V2, V3) in a volume flow direction (VR), the volume flow (V1, V2, V3) being able to be formed by means of the volume backflow generator (3), the volume flow direction (VR) in the gravity slide extending counter to the filament running direction (FR), the guide length (L) of the gravity slide (4) for guiding the volume flow (V1, V2, V3) and / or the diameter (D1, D2, D3) of the gravity slide (4) being able to be feedback-controlled in order to adjust a volume flow rate (VG) of the volume flow, and to a related melt spinning plant (1) having the gravity slide (4), and to a method for cooling a filament using the gravity slide (4).

The invention relates to the technical field of fiber spinning, in particular to a master batch melt extrusion fiber spinning system which comprises a bundling device, a first oil inlet hole is formed in the inner wall of an oil nozzle of the bundling device and can be communicated with a first external oil pipe, a limiting part of the oil nozzle forms an oil spraying channel, and a second oil spraying hole is formed in the inner wall of the limiting part and communicated with a second external oil pipe. The oil spraying device achieves the technical effects that oil can be evenly sprayed to the filaments, and bundling of the filaments is facilitated.

The application discloses a kind of high-strength polylactic acid melt-spun fibers prepared by low-temperature cold drawing.The preparation method comprises the following steps: (1) drying, polylactic acid chip is placed in oven for drying; (2) melt extrusion, polylactic acid chip after drying is put into screw extruder for heating and extrusion; (3) drawing, extruded polylactic acid melt is introduced to drawing roller, and the fiber is thinned by rotating speed; (4) collection, polylactic acid fiber is introduced to collection roller for winding.The application dries polylactic acid chip before use to remove moisture, avoiding hydrolysis in melt processing; spinning is carried out at a lower spinning temperature, ensuring the flowability of polylactic acid while avoiding the probability of high-temperature thermal degradation; drawing is carried out at room temperature, and polylactic acid fiber is oriented and induced to crystallize.The polylactic acid fiber obtained by the method has good mechanical properties.

The invention relates to the technical field of filament spinning, and discloses energy-saving polyester filament direct spinning equipment which comprises a base and a connecting cylinder rotationally arranged on the base, under the cooperation of an air pump, an air injection pipeline, a pipeline, a limiting pipeline, an air outlet pipeline and a guide plate, polyester filaments passing through the guide plate can be quickly blown and cooled, and the spinning efficiency of the polyester filaments is improved. Meanwhile, under the cooperation of an air pump, a limiting pipeline, recycling pipelines and an air suction pipeline, the multiple recycling pipelines communicated with the limiting pipeline generate suction force, polyester yarn can enter an inner cavity of the air suction pipeline in a unified mode, fan blades are arranged at the air suction end, and under the cooperation of the fan blades, a threaded rod, a fixing panel and a second spring, the polyester yarn can enter the air suction pipeline in a unified mode; and a fixed panel can move in a reciprocating manner, and a second spring is stretched out, drawn back and compressed, so that the absorbed polyester yarn can be conveniently wound, the broken polyester yarn can be collected while the polyester yarn is cooled, and the winding quality and the winding efficiency are guaranteed.