1982results about "Open-end spinning machines" patented technology

A vascular prosthesis comprising a first layer having a predetermined first porosity and a second layer having a predetermined second porosity, wherein the first layer and the second layer are each made of first and second electrospun polymer fibers.

The invention relates to a nano-fiber covering yarn electrostatic spinning device and application thereof. The nano-fiber covering yarn electrostatic spinning device comprises a twisting device, a backing-off device, a winding device, a double-needle electrostatic spinning device and a control system. The invention also provides a method for preparing electrostatic spinning nano-fiber covering yarns. The method comprises the following steps of performing spinning by using prepared spinning liquor through the double-needle electrostatic spinning device; depositing nano-fibers on a metal funnel and core yarns; uniformly winding the nano-fibers on the core yarns moving at constant speed by rotating the metal funnel; and finally forming the nano-fiber covering yarns of which skin layers are nano-fibers. The invention also provides another method for preparing a nano-fiber fabric. The other method for preparing the nano-fiber fabrics comprises the following steps of using water soluble yarns as core yarns; preparing the nano-fiber covering yarns by using the method; preparing a covering yarn fabric by using a textile technology; and dissolving the core yarns to obtain the nano-fiber fabric. The maneuverability is high; the nano-fiber covering yarn electrostatic spinning device is novel in structure; and the nano-fibers on surfaces of the covering yarns are arranged controllably.

The invention relates to a continuous preparation device and a method for orientated electrostatic spinning nanofiber yarn. The device comprises a metal round target and a yarn guide rod. The center of the metal round target is connected with one end of an insulating rod, the insulating rod is driven by a motor I to rotate, a metal top end of the front portion of the yarn guide rod is aligned with the center of the metal round target, the yarn guide rod is perpendicular to a bobbin, the bobbin is driven by a motor II to rotate, the metal round target, the insulating rod, the motor I and the yarn guide rod are arranged on the same center straight line, a spinning jet I and a spinning jet II which are symmetrical with each other are arranged on the left side and the right side of the metal round target and the yarn guide rod, the spinning jet I is connected with a high voltage static positive terminal, and the spinning jet II is connected with a high voltage static negative terminal. By means of the continuous preparation device and the method for the orientated electrostatic spinning nanofiber yarn, continuous production of the nanofiber yarn is achieved, the yield of electrostatic spinning is increased, and both the degree of orientation and the yield of the nanofiber yarn are high.

At a milling machine to work ground surfaces, with a machine frame, a milling drum supported at the machine frame, at least one transport device arranged at the machine frame which accepts the milled material from the milling drum, as well as with a suction device for the air polluted with dusts and vapors, whereby the milled material on the at least one transport device is enclosed by a channel, the suction device is connected to a rear channel section of the channel in the direction of the material transport and sucks off the air polluted during milling at the milling drum and in the rear channel section essentially in the direction of the material transport, it is provided that the suction device consists of a suction ventilator, a separator device for solids and a suction channel which is connected to the rear channel section, that the suction ventilator is arranged downstream of the separator device, and that the suction device disposes of the separated solids onto the transport device in a forward channel section in the direction of the material transport or into a collecting device, and the suction ventilator blows off the cleaned air into the environment.

A composite, break-resistant sewing thread having a core of continuous multi-filament, non-stretch high-tenacity synthetic yarn and a cover of drafted staple fibers air-jet twisted around and covering the core for protecting the core from heat and friction during a sewing operation. The yarn is plied.

Production method of nanofibres from the polymeric solution through electrostatic spinning in electric field created by a difference of potentials between the collecting electrode (4) and pivoted spinning electrode (1) of an oblong shape touching by a part of its circuit the polymeric solution (3), while by rotation of the spinning electrode (1) the polymeric solution (3), at least by a portion of its surface, is carried out into the electric field in which on the surface of the collecting electrode (4) the nanofibres are created which are carried to the collecting electrode (4) and deposited on the surface of a basic material (5) guided between the spinning electrode (1) and the collecting electrode (4) in vicinity of the collecting electrode (4). The polymeric solution (3), on surface of the spinning electrode (1) in a place of intersection of surface of the spinning electrode (1) with the plane interlaid by the axis of the spinning electrode (1) and being perpendicular to the plane of the base material (5), along the whole length of the spinning electrode (1), is subject to the electric field of a maximum and equal intensity, through which a high and even spinning effect is achieved along the whole length of the spinning electrode (1). The invention also relates to the device for production of nanofibres from polymeric solution through electrostatic spinning.

This method provides various high-power-ratio snow removal devices which clear paths narrower than the motor vehicles. We use small, light, low-priced, yet also safe, durable devices to clear the narrow swaths. High power ratios result from applying motor vehicle horsepower to small snow removal devices similar to those found on lawn tractors. Such devices may comprise moldboard plows (FIGS. 3, 9, 10, 11, 15, 16), snow throwers (FIGS. 7 and 13), or combinations of both types (FIG. 12 and 17). Quick-connect and quick-release fittings (FIGS. 3A, 3B, 6, 8, 9A, 9B, 14) position each device for temporary propulsion by a vehicle. The connectors allow quick conversion of the family car to a plowing machine, and when plowing is done, quick re-conversion. A moldboard plow of about half the car's width (FIG. 3) is our preferred embodiment. The mini-moldboard (FIG. 10) is least expensive. Deepest snow can be handled by our tall, narrow moldboard (FIG. 15). We protect homeowners, their cars and their plows from injury when plows strike hidden objects. Protection devices comprise safety springs (60) and pivots (63, 67 and 69) of FIG. 3B, the tension-release mechanism mentioned but not detailed in FIG. 15, annor shields (396, 398) of FIG. 16 and various others mentioned or provided for in our drawings but not detailed. We prefer cars' chassis tie-down ears (72) in FIG. 3A, as connector points for our plow or thrower arms. For cars lacking such ears, we propose add-on ears. For example, tie-down ear (126) in FIG. 6.

The invention provides an air-jet vortex spinning device which can be used to produce core-spun yarn. The air-jet vortex spinning device comprises a vortex chamber, a spindle-like doffing tube, a vortex tube connected with a fixing bracket, and an air jet orifice arranged inside the vortex tube. The air-jet vortex spinning device is characterized in that a truncated cone shaped or cylindrical fiber and core yarn guiding assembly is arranged at the entrance of the vortex tube. The air-jet vortex spinning device has the advantages that the air-jet vortex spinning device is capable of enabling the short fiber bundles to evenly wrap and twine the core yarn, and the core-spun yarn produced by the device is even in quality. The air-jet vortex spinning device ensures that the core yarn is totally wrapped by short fiber bundles, thus improving wear resistance of the core-spun yarn.

The invention discloses a high-speed preparation device of centrifugal electrostatic spinning nanometer twisted yarns. The high-speed preparation device mainly comprises a feed extrusion device, a motor, an electromagnetic heating coil, a bearing, a conical ring perforated electrode, a centrifugal rotating umbrella-type spray head, an air compressor, a cyclone vacuum generator, a roller receiving device, a high-voltage electrostatic generator, a synchronous toothed belt and a rack, wherein the motor drives the centrifugal rotating umbrella-type spray head to rotate at high speed; the electromagnetic heating coil is in non-contact connection with the centrifugal rotating umbrella-type spray head and is heated through radiation; the feed extrusion device is used for supplying feed to the centrifugal rotating umbrella-type spray head through a hole in the center of the centrifugal rotating umbrella-type spray head; the conical ring perforated electrode is fixed at the middle position of the center of the rack. The high-speed preparation device is combined with an electrostatic spinning technology and a centrifugal spinning technology; a rotating airflow is formed in a chamber by the combined use of the air compressor and the cyclone vacuum generator to guide fiber to form twisted yarns, so that the orientation controllability of nanofiber is achieved; conditions are created for industrial application of the nanofiber in the specific industries, such as water treatment.

A MEMS device, for example a capacitive microphone, comprises a flexible membrane 11 that is free to move in response to pressure differences generated by sound waves. A first electrode 13 is mechanically coupled to the flexible membrane 11, and together form a first capacitive plate of the capacitive microphone device. A second electrode 23 is mechanically coupled to a generally rigid structural layer or back-plate 14, which together form a second capacitive plate of the capacitive microphone device. The capacitive microphone is formed on a substrate 1, for example a silicon wafer. A back-volume 33 is provided below the membrane 11, and is formed using a “back-etch” through the substrate 1. A first cavity 9 is located directly below the membrane 11, and is formed using a first sacrificial layer during the fabrication process. Interposed between the first and second electrodes 13 and 23 is a second cavity 17, which is formed using a second sacrificial layer during the fabrication process. A plurality of bleed holes 15 connect the first cavity 9 and the second cavity 17. Acoustic holes 31 are arranged in the back-plate 14 so as to allow free movement of air molecules, such that the sound waves can enter the second cavity 17. The first and second cavities 9 and 17 in association with the back-volume 33 allow the membrane 11 to move in response to the sound waves entering via the acoustic holes 31 in the back-plate 14. The provision of first and second sacrificial layers has the advantage of protecting the membrane during manufacture, and disassociating the back etch process from the definition of the membrane. The bleed holes 15 aid with the removal of the first and second sacrificial layers. The bleed holes 15 also contribute to the operating characteristics of the microphone.

The present invention is one kind of blended aramid yarn and its production process. The blended aramid yarn consists of aramid fiber 10-60 wt%, polyacrylic-polyvinyl chloride fiber 30-80 wt% and antistatic synthetic fiber 1-10 wt%, and has fiber length of 38 mm or 51 mm and spinning count of 10 s-50 s. It is produced through mixing material, producing card sliver, drawing and jet spinning. The production process includes spraying the polyacrylic-polyvinyl chloride fiber with antistatic agent, two card sliver producing modes, etc. The blended aramid yarn has excellent wear resisting property, excellent fireproof performance and high electrically insulating performance, and the fabric produced with the blended aramid yarn may be used in special suits for use in high temperature, electric welding and high voltage environment, and used in making fireproof decoration.

The present invention discloses the process of producing blended cheese yarn with high content of ultra short low density fiber in cotton spinning apparatus. A punching with high homogeneity and great cohesion is first produced through mixing ultra short low density fiber and other fiber in an opening and picking step much loosening and less beating; and then produced into cheese through the steps of combing, drawing, roving, spinning and coning. The blended cheese yarn consists of ultra short low density fiber 51-95 wt%, natural fiber 5-49 wt% and chemical fiber 5-49 wt%. The blended cheese yarn with high content of ultra short low density fiber is light, soft, lofty and high in strength, and its produced fabric has high color fastness.

The present invention relates to an automatic spinning new end forming method and its equipment. The roving machine utilizes the coder positioned at the drafting portion position to detect the full-yarn length when the bobbin can be fulled, and makes the roving machine spin to a certain length in low speed, after the roving is spun to a certain length, makes the roving machine operate in low speed, at the moment makes the spindle rail stop lifting movement and makes the yarn be in said height position, winds 2-3 turns of halching and makes the spindle rail be quickly lowered to form large thread pitch wind so as to make the roving do not take-off in its transportation process; changes the speed ratio of flywer and roller so as to reduce roving twist, and obtain undertwisted roving, and when the ultralowering of spindle rail is made to place, the yarn is stretch-broken to produce fuzzy fibre whose length can be suitable for secondary automatic spinning new end formation.

The invention discloses a machining device for spun core yarn with jet swirl, comprising upper and lower twisters, which is composed of air inlet port 1, fiber inlet port 5, discharging port 7, yarn port 14 and inlet port for synthetic filament 15. Upper and lower twisters contain a matched swirl twisting part, in which eddy current field is formed. Short fibers and synthetic filaments enter into the swirl twisting part from the fiber inlet port 5 and the inlet port for synthetic filament 15 respectively. In the eddy current field fiber strands are twisted into core yarns with twist. The upper twister is combined with the lower twister by the outlet port of strand 6 and the inlet port of strand 13. The whole is installed on the rack between the drafting area and the winding area on the spinning machine. The device improves the manufacturing efficiency obviously and accomplishes the drafting to synthetic filaments.

A method and a device with a control apparatus (50) for starting an electric machine (10) with a rotor (20), particularly the spinning cup of an open-end spinning machine, magnetically mounted by a bearing having permanent magnets (31, 32, 33, 34). An actuator system controls the position in the axial direction (35, 36) and two limitation bearings (41, 42), determine the axial end positions of the rotor. The actuator system brings about a lifting from the first axial end position, and a system variable during such lifting is compared with a reference value, and the rotor (20) is moved into the second end position, and the actuator system brings about a lifting from the second axial end position, and a system variable on lifting from the second end position is compared with a reference value.

The invention provides a method for producing hemp yarns through vortex spinning. The method comprises the following steps: curing pretreatment of hemp fibers, a bale plucker, a bending and opening machine, an opening machine, a vibrating feed box, a lap machine, a carding machine, a pre-draw frame, a draw frame and lap machine combined, a combing machine, a draw frame and a vortex spinning machine, wherein in the step of curing pretreatment of hemp fibers, the addition of an oil feeding and conditioning soft penetrating agent is 6-8% of hemp fibrils by weight; the oil feeding and conditioning soft penetrating agent comprises 12-16% of emulsifying agent, 6-10% of softening agent and 75-79% of soft water; and the moisture regain is controlled between 12% and 15%. The method has the following advantages: the maximum count of the weaved hemp yarns can be 50; the noil rate is reduced; the flexibility, parallel straightness, spinnability and strength of the fibers are improved; the finished product rate is high; the hemp fibers are protected by adopting the methods of more opening and fewer beating and jogging; and the method lays the foundation for normal production through vortex spinning.

An electrospinning apparatus including a spinning dope main tank, a metering pump, a nozzle block, a collector positioned at the lower end of the nozzle block for collecting spun fibers, a voltage generator, a plurality of units for transmitting a voltage generated by the voltage generator to the nozzle block and the collector, said electrospinning apparatus containing: a spinning dope drop device positioned between the metering pump and the nozzle block, the spinning dope drop device having (i) a sealed cylindrical shape, (ii) a spinning dope inducing tube and a gas inletting tube for receiving gas through its lower end and having its gas inletting part connected to a filter aligned side-by-side at the upper portion of the spinning dope drop device, (iii) a spinning dope discharge tube extending from the lower portion of the spinning dope drop device, and (iv) a hollow unit for dropping the spinning dope from the spinning dope inducing tube formed at the middle portion of the spinning dope-drop device.

To provide a textile machine enabling easy doffing of a full package 45. The textile machine 1 has a plurality of yarn-processing units 2 capable of forming a package 45 and placed in a row. The machine is provided with a doffing truck 4 traveling between the units along the direction of the yarn processing unit row and transferring the full package 45 to a storage area 95. The traveling path 86 of the doffing truck 4 is placed between the storage area 95 of the full package 45 and the yarn processing unit 2 in a direction perpendicular to the direction of the yarn processing unit row (the lateral direction in the selected figure). When the yarn running side of the yarn processing unit 2 is taken as the front side, the traveling path 86 of the doffing truck 4 and the storage area 95 are placed at the front side.

An apparatus for producing a textile product generally includes a feeding section for providing a starting material to facilitate producing a textile product derived from the starting material; a drafting section operably coupled to the feeding section for gripping, pulling, stretching and breaking at least one strand of the starting material into at least one continuous and cohesive network of an intermediate product; and a spinning section operably coupled to the drafting section for winding and twisting the at least one continuous and cohesive network of an intermediate product onto a removable receiving member to form the textile product; the feeding section, the drafting section, and the spinning section are configured to form the textile product in a continuous operation.

An electrospinning apparatus including a spinning dope main tank, a metering pump, a nozzle block, a collector positioned at the lower end of the nozzle block for collecting spun fibers, a voltage generator, a plurality of units for transmitting a voltage generated by the voltage generator to the nozzle block and the collector, said electrospinning apparatus containing:a spinning dope drop device positioned between the metering pump and the nozzle block, the spinning dope drop device having(i) a sealed cylindrical shape,(ii) a spinning dope inducing tube and a gas inlet tube for receiving gas through its lower end and having its gas inlet part connected to a filter aligned, side-by-side, at the upper portion of the spinning dope drop device,(iii) a spinning dope discharge tube extending from the lower portion of the spinning dope drop device, and(iv) a hollow unit for receiving the spinning dope from the spinning dope inducing tube provided at the middle portion of the spinning dope-drop device.

The invention discloses ultra-high-count pure cotton combing yarn and a spinning technology of the ultra-high-count pure cotton combing yarn. Raw cotton comprises, by weight, 15%-25% of Egypt cotton, 25%-35% of American cotton and 40%-50% of Xinjiang long stapled cotton, wherein the Egypt cotton, the American cotton and the Xinjiang long stapled cotton are blended to spin 200S to 300S pure cotton yarn. The spinning technology includes the following steps that the first procedure of blowing-carding, the second procedure of combing, the third procedure of drawing, the fourth procedure of roving yarn, the fifth procedure of spun yarn and the sixth procedure of spooling. With the blending scheme, the raw cotton can integrate the advantages of high fineness and good maturity of the Egypt cotton, the advantages of high strength and non-existing abnormal fibers of the American cotton, the advantage of large length of the Xinjiang long stapled cotton and the like. The raw cotton reaches the requirements for the fiber length, the length CV value, the Micronaire value, the fineness, the strength and other performance indexes of raw cotton in producing ultra-high-count yarn. According to the spinning technology of the ultra-high-count pure cotton combing yarn, the ultra-high-count yarn can be produced under a large ration of roving yarn, the spinning efficiency is improved and meanwhile, quality of resultant yarn is ensured.

The present invention is color yarn and its jet spinning method. The color yarn consists of grey fiber and color fiber in the ratio of 70-95 to 5-30, and is preferably in the size of 12s / 1-46s / 1. The grey fiber is cotton, viscose, Tencel or other cellulose fiber, polyester fiber, hemp or silk; and the color fiber is color polyester fiber, color viscose, color cotton fiber or their blended material. The making process of the color yarn includes the following steps: processing grey fiber into sliver A of 3-4 g / m; processing color fiber into sliver B of 2-3 g / m, merging sliver A and sliver B in required ratio and jet spinning to form the color yarn. The color yarn has special hand feeling owing to jet spinning, and inhomogeneous color completely different from that of available bunchy yarn.

The invention discloses an airflow bundling rotating twisting nanometer twisted thread preparation device and process. The device mainly comprises a heating coil, an airflow auxiliary static electric spinning nozzle device, an air suction device, a perforated electrode, a perforated acrylic plate, a high-voltage static electricity generating device, a V-shaped groove collecting roller, a roller support frame, a circular disc, a center shaft and an electric motor, wherein the air suction device can form vertical and downward gathering airflow, so that local negative pressure is formed at the upper side; fiber can favorably fall into the upper air inlet; the rotating speed of the V-shaped groove collecting roller is approximately identical to the falling speed of the fiber, so that the fiber orientation can be favorably realized; the regular collection of the fiber can also be realized. By regulating the rotating speed of the motor, the rotating speed of the circular disc round the center shaft can be controlled; the goal of twisting fiber between the air outlet of the air suction device and the V-shaped groove collecting roller can be achieved; nanometer twisted threads with different twisting degrees can be obtained through controlling the twisting angle of the fiber by controlling the rotating speed of the circular disc; the application requirements in different fields can be met.

A method for forming yarn provides for forming an intermediate product being a fire retardant and heat resistant cohesive elongated network of fibers in a single operation by stretching and breaking filaments of a ribbon like tow starting material of longitudinally aligned filaments. The intermediate product may be wool-like with wavy and randomly oriented fibers formed by from the fragmented filaments. The single drafting operation includes directing the tow through first and second pairs of rollers, the second pair rotating faster than the first. The intermediate product may be spun directly into yarn in one spinning / twisting operation. The fire retardant and heat resistant yarn so produced may include 100% oxidized polyacrylonitrile fibers having an average length greater than about 15 cm. The yarn may be knitted or otherwise formed into fire-retardant and heat resistant fabrics or other products used in various applications.

The invention relates to a novel nano electrostatic frictional spinning device. the device comprises a feeding area I, a feeding area II and a pair of frictional rollers, wherein the yarns in the feeding area I are conveyed in the axial direction of each frictional roller shaft; the yarns in the feeding area II are conveyed in the radial direction of each frictional roller shaft; the feeding area I and the feeding area II are respectively used for spinning and conveying of yarn fiber combination bodies and electrostatic nano fibers; the yarn fiber combination bodies and the electrostatic nano fibers are combined at the pair of frictional rollers rotating in the same direction; yarn strips are gyrated under the effect of gyring torque generated by the frictional rollers so as to form covering yarns with the nano fibers at the outside or inside, or form the covering yarns with the nano fibers and the yarn fiber combination bodies at the outside and the nano fibers at the inside; then the covering yarns are drawn out through a stretching roller. With the adoption of the device, the yarn structure is compact; the problems of leather and yarn evenness caused by the nano fibers can be avoided; the yarns are high in moisture absorbing performance, oil absorbing performance and filtering performance; the utilization rate of the electrostatic spun nano fibers can be increased, and the application field of an electrostatic spinning machine can be expanded.

The invention relates to a jet yarn spinning machine for electrostatic-spun nanofibers. The machine comprises a high-voltage static electricity generator, a liquid storage tank with a pressurizing device, a cross-flow air pump, a gathering unit, a spinning unit, a semicircular base, a buncher, a jet nozzle twister, a yarn guide roller and a winding mechanism. The jet yarn spinning machine integrates the functions of spinning, gathering, drafting, twisting and winding and can be used for continuously producing electrostatic-spun nanofiber yarn. The yield of electrostatic-spun nanofibers is greatly increased; and the twister is simple in structure and high in production efficiency. A nanofiber yarn forming method is simple in process and high in yarn yield, is applicable to multiple polymer spinning solutions and can realize the continuous batch preparation of nanofiber yarn.

The invention relates to a device and a method for twisting electrostatic spinning nanofiber into yarn in a jetting mode. A spinning solution is injected in an injector of a fiber jetting device, a needle of the injector is connected with a high voltage static electricity generating device, the spinning solution is subjected to the effect of electric field force to form a Taylor cone to jet flow, the spinning solution is deposited on the surface of a solvent in a water tank to form a felt-shaped material, nanofiber bundles are formed by the felt-shaped material through mobility of the solvent and traction of a roller and subsequent devices, a drafting device is heated to remove the solvent contained in the nanofiber bundles to achieve effective drafting, the nanofiber bundles are sent in a Laura jaw, an air compressor is started, the nanofiber bundles enter a double-nozzle twisting device and are twisted into the yarn through mutual effect of a first nozzle and a second nozzle, and the yarn is led out through an output roller and wound into a cylinder through a winding device. The device and the method for twisting the electrostatic spinning nanofiber into the yarn in the jetting mode integrate fiber jetting, condensation, bundle concentration, drafting, twisting and winding and are simple in device and process, suitable for various polymer spinning solutions and capable of achieving continuous and large-scale production of the nanofiber yarn.

The invention discloses a special idle gear system for a four-roller compact spinning machine. The system comprises an idle gear assembly for driving; the idle gear assembly comprises a maser idle gear, a first auxiliary idle gear and a second auxiliary idle gear which are arranged on either side of the maser idle gear respectively. The system has the advantages of rational and compact structure and low renovation cost, and can help improve spinning effect.

The complex twisting device for air-jet eddyc-current spining to twist fiber strand consists of the upper twisting unit and the lowr twisting unit. Positive pressure air flow is utilized to produce eddy-current field and pipe flow and the fiber is fed to the eddy-current field via the conveying pipe. Fiber strand rotates with the high-speed rotating air flow while the pipe flow protects and guides the twisted fiber strand to leave from the eddy-current field. During the process, fiber strand is twisted to produce twisted yarn in high speed. The present invention makes it possible to produce high-quality yarn at low cost and high speed.

The present invention provides a spinning machine, including a yarn accumulating roller (21), a yarn hooking member, a yarn removing lever (28), a suction pipe (44), and a unit controller. The hooking member can wind a spun yarn (10) around the yarn accumulating roller (21). The yarn removing lever (28) can remove the spun yarn (10) from the yarn hooking member. The suction pipe (44) can catch a yarn end of the spun yarn (10) and includes a twisting nozzle capable of applying twists to the caught spun yarn (10). The unit controller controls the twisting nozzle to operate while the spun yarn (10) caught by the suction pipe (44) is being wound around the yarn accumulating roller (21), and controls the twisting nozzle to stop before the yarn removing lever (28) removes the spun yarn (10) from the yarn hooking member.