CN109234882B - Continuous preparation method and preparation device of core spun yarn - Google Patents

Continuous preparation method and preparation device of core spun yarn Download PDF

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Publication number
CN109234882B
CN109234882B CN201811023463.4A CN201811023463A CN109234882B CN 109234882 B CN109234882 B CN 109234882B CN 201811023463 A CN201811023463 A CN 201811023463A CN 109234882 B CN109234882 B CN 109234882B
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yarn
core
shaft
installation
outer layer
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CN109234882A (en
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闫涛
潘志娟
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Suzhou University
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Suzhou University
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • D01H13/045—Guide tube
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D02G3/042—Blended or other yarns or threads containing components made from different materials all components being made from natural material
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/10—Inorganic fibres based on non-oxides other than metals
    • D10B2101/12—Carbon; Pitch
    • D10B2101/122—Nanocarbons
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/01—Natural vegetable fibres
    • D10B2201/02—Cotton
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2211/00—Protein-based fibres, e.g. animal fibres
    • D10B2211/01—Natural animal fibres, e.g. keratin fibres
    • D10B2211/04—Silk
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

The invention relates to a continuous preparation method and a preparation device of core-spun yarn, wherein the method comprises the following steps: in the process that the core yarn moves linearly at a uniform speed and rotates around a central shaft of the core yarn, the outer layer yarn actively conveyed at low tension is connected with the core yarn, and the outer layer yarn is driven to be wrapped on the surface of the core yarn through the rotation of the core yarn to prepare the core-spun yarn, wherein the low tension is 1-40 cN; the device comprises a transmission device d1, a transmission device d2 and a transmission device d3, a mounting shaft a1, a tension device b1, a yarn fixing ring c2, a tension device b2, a mounting shaft a2, a tension device b3 and a mounting shaft a3 which are arranged from the near to the far and are positioned on one side of the linear running direction of the core yarn. The continuous preparation method and the preparation device of the core-spun yarn have simple structure, effectively solve the problem that the low-strength yarn cannot be used as the outer layer yarn for coating in the prior art, and realize the coating of the low-strength yarn serving as the outer layer yarn on the core yarn.

Description

Continuous preparation method and preparation device of core spun yarn
Technical Field
The invention belongs to the field of preparation of core-spun yarns, and relates to a continuous preparation method and a continuous preparation device of core-spun yarns.
Background
The core spun yarn is a novel yarn formed by combining two or more fibers or yarns. The preparation method of the core spun yarn is various, the conventional preparation method of the core spun yarn is mainly modified on the basis of a spinning frame and ring spinning, for example, a patent CN104894717A and a patent CN106687628A are characterized in that the core spun yarn is added into a spinning process in a spinning triangle, the added core spun fiber is wrapped on the fiber surface of the roving and is drawn and twisted on the yarn surface through a plurality of rollers to form the core spun yarn, the structure of the device is complicated, the outer layer of the core spun yarn is in a fibrous shape, and continuous coating among yarns cannot be realized. Patent CN206015199U also discloses a device for preparing core-spun yarn from yarn with outer layer, which winds radiation-resistant yarn onto the surface of cotton yarn to obtain a radiation-resistant core-spun yarn successfully, although the device has simple structure, only a single yarn can be used as outer layer, and there is a certain requirement on the strength of the outer layer yarn, and the low-strength yarn cannot be used as outer layer yarn to cover the core yarn. Researchers have also explored nanofiber core spun yarns as in patent CN 107338541a and literature (yarn formation mechanism of nanofiber core spun yarns and experiment [ D ]. The academy of raw materials, 2014.), but because of low nanofiber strength, nanofibers can only be coated on common yarns during the forming process, while yarns with low strength as nanofiber yarns cannot be coated as outer yarns.
Therefore, it is of great importance to develop a method for preparing core spun yarn from low strength yarn as outer layer yarn.
Disclosure of Invention
The present invention has been made to overcome the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a continuous production method and production apparatus for producing a core spun yarn using a low-tenacity yarn as an outer yarn. According to the invention, the coating of the core yarn is realized through the rotation of the three motors, the uniformity of the core-spun yarn prepared under the action of the porous yarn tube is obviously improved, and the core yarns with different numbers and types can be added on the unwinding motor, so that the continuous preparation of the composite core-spun yarn with different structures is realized.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the continuous preparation method of the core-spun yarn comprises the steps of connecting the outer layer yarn actively conveyed under low tension with the core yarn in the process of uniform linear motion of the core yarn and rotation around a central shaft of the core yarn, and winding the outer layer yarn on the surface of the core yarn by driving the outer layer yarn to wind through rotation of the core yarn, wherein the low tension is 1-40 cN, the running route of the outer layer yarn before connection is mutually perpendicular to the running route of the core yarn or forms an acute angle with the advancing direction of the core yarn, and the acute angle is favorable for winding the outer layer yarn on the surface of the core yarn.
The invention adopts the motor to realize the automatic winding and unwinding of the yarn drum, the yarn only bears the external force given by the tension device in the coating process, the tension applied to the yarn by the tension device is smaller, the yarn is only kept in a straightened state in the coating process, and the yarn can be regulated according to the strength of the yarn, so the invention has lower strength requirement on the outer layer yarn. In the prior art, the yarn drives the yarn drum to rotate, and the rotating speed of the yarn drum is uncontrollable, so that the requirement on the strength of the outer layer yarn is high.
As a preferable technical scheme:
in the continuous preparation method of the covering yarn, the core yarn is actively conveyed, the number of the core yarn and the outer layer yarn is 1 or more, more preferably, the number of the core yarn and the outer layer yarn is 1 or 3, if the number of the core yarn is too large, the quality of a yarn barrel of the core yarn is increased, the vibration degree of a mechanical device is too large, the movement state of the core yarn is unstable, the types of the plurality of core yarns are the same or different, the strength is the same or different, the types of the plurality of outer layer yarns are the same or different, the strength of the outer layer yarn is greater than 5cN, and any yarn with the strength greater than 5cN can be used as the outer layer yarn of the invention, yarns greater than 5cN include both high strength yarns and low strength yarns, the present invention effectively solves the problem that prior art low strength yarns cannot be covered as an outer layer yarn, which is a common filament yarn (e.g., mulberry silk filament yarn), a spun yarn (e.g., cotton yarn, polyacrylonitrile spun yarn), a nanofiber yarn, or a carbon nanotube yarn, wherein nanofiber yarn and carbon nanotube yarn are low strength yarns known in the art, and the prior art has not realized that nanofiber yarn and carbon nanotube yarn are used as an outer layer yarn to prepare a core yarn, which is a common filament yarn (e.g., mulberry silk filament yarn), a spun yarn (e.g., cotton yarn, polyacrylonitrile spun yarn), a nanofiber yarn, or a carbon nanotube yarn.
A continuous process for the preparation of core spun yarn as described above, the diameter and speed of the core yarn and the outer layer yarn satisfying the following conditions:
wherein V is 1 The unwinding speed of the core yarn is expressed in m/min, V 2 The unwinding speed of the outer layer yarn is expressed in m/min, r is the rotating speed of the core yarn, d is expressed in r/min 1 Is the diameter of the core yarn, the unit is meter, d 2 Is the diameter of the outer yarn in meters.
A continuous process for the preparation of a core spun yarn as described above, said core yarnDiameter of 0.1×10 -3 ～1×10 - 3 m, the diameter of the outer layer yarn is 0.1 multiplied by 10 -3 ～1×10 -3 m, the unwinding speed of the core yarn is 0.2-2 m/min, and the unwinding speed of the outer layer yarn is 0.321-4.817 m/min.
According to the continuous preparation method of the core-spun yarn, the core-spun yarn has a spiral structure, the thread pitch of the outer layer yarn is uniform, the thread pitch of the outer layer yarn is 0.133-0.9 mm, and the thread pitch CV value is 0-5%.
The invention also provides a preparation device adopting the continuous preparation method of the core-spun yarn, which comprises a transmission device d1, a transmission device d2, a transmission device d3, a mounting shaft a1, a tension device b1, a yarn fixing ring c2, a tension device b2, a mounting shaft a2, and a tension device b3 and a mounting shaft a3 which are arranged from the near to the far side in the linear running direction of the core yarn, wherein all the tension devices are small lifting hooks which are hung on the yarn and move up and down along with the tension of the yarn and the difference of the length of free yarn between a core yarn drum and the core yarn drum;
the installation shaft a1, the installation shaft a2 and the installation shaft a3 are respectively used for installing the core yarn bobbin, the core yarn bobbin and the outer layer yarn bobbin, the transmission device d1, the transmission device d2 and the transmission device d3 are respectively used for driving the core yarn bobbin, the core yarn bobbin and the outer layer yarn bobbin to rotate around the central shaft of the transmission device d1, the core yarn bobbin and the outer layer yarn bobbin, the installation shaft a1 and the installation shaft a2 are respectively connected with the driving device e1 and the driving device e2 for driving the core yarn bobbin, the driving device e1 and the driving device e2 to rotate around the shaft beta and the shaft epsilon, the shaft beta and the shaft epsilon are parallel to a horizontal plane and are respectively perpendicular to the central shafts of the installation shaft a1 and the installation shaft a2, all tension devices are used for guaranteeing that yarns are in a straightening state, and all yarn fixing rings are used for controlling the vibration amplitude of the yarns.
As a preferable technical scheme:
the preparation device comprises a preparation device, wherein a mounting shaft a1, a mounting shaft a2 and a mounting shaft a3 are respectively arranged in a core yarn fixing frame, a core yarn wrapping fixing frame and an outer yarn fixing frame, all fixing frames are -shaped structures and are composed of two side plates and a bottom plate vertically connected with the two side plates, all the mounting shafts are parallel to the bottom plate and are simultaneously connected with the two side plates in a sliding mode, and the sliding connection is achieved by arranging long grooves on the side plates and then inserting two ends of the mounting shaft into the long grooves.
The preparation device as described above, the transmission d1 is composed of an unwinding motor and an unwinding roller connected by a belt and mounted on the core yarn fixing frame, the unwinding roller being parallel to the mounting shaft a1 and located between the mounting shaft a1 and the bottom plate;
the transmission device d2 is composed of a winding motor and a winding groove drum which are connected through a belt and are arranged on the core-spun yarn fixing frame, the winding groove drum is parallel to the installation shaft a2 and is positioned on one side of the installation shaft a2 far away from the bottom plate, two ends of the winding groove drum and the installation shaft a2 are respectively connected through a spring f3, and the spring f3 is embedded in a strip-shaped groove, and the natural length of the spring f3 is smaller than the sum of the radius of the winding groove drum and the radius of the installation shaft;
the transmission device d3 consists of a motor g3 and a driving roller, the driving roller is parallel to the mounting shaft a3 and is positioned between the mounting shaft a3 and the bottom plate, and a rotating shaft of the motor g3 is connected with one end of the driving roller;
the driving device e1 and the driving device e2 are respectively a motor g1 and a motor g2, the rotating shafts of the motor g1 and the motor g2 are respectively and vertically connected with the bottom plates of the core yarn fixing frame and the covering yarn fixing frame, the rotating directions of the rotating shafts of the motor g1 and the motor g2 are the same, the rotating speeds are 300-1500 revolutions per minute, the central axes of the rotating shafts of the motor g1 and the motor g2 are collinear with an axis beta and an axis epsilon, and the intersection point of the axis beta and the central axis of the installation axis a1 and the intersection point of the axis epsilon and the central axis of the installation axis a2 are respectively the midpoints of the central axes of the installation axis a1 and the installation axis a 2.
According to the preparation device, the number of the installation shafts a1 is 1 or more, the ends, away from the bottom plate, of the two side plates in the core yarn fixing frame are respectively connected with the two ends, away from the bottom plate, of the installation shaft a1 closest to the installation shafts a1 through the springs f1, the springs f1 are embedded in the strip-shaped grooves, the natural length of the springs f1 is larger than the distance between the unwinding roller and the ends, away from the bottom plate, of the two side plates, so that the core yarns on the installation shafts a1 are always tangent, the core yarns, close to the unwinding roller, are always tangent to the unwinding roller, the number of the installation shafts a3 is 1 or more, the ends, away from the bottom plate, of the two side plates in the outer layer yarn fixing frame are respectively connected with the two ends, away from the bottom plate, of the installation shaft a3 closest to the installation shafts a3, of the outer layer yarn fixing frame through the springs f2 are embedded in the strip-shaped grooves, the natural length of the springs f2 is larger than the distance between the driving roller and the ends, away from the bottom plate, and the core yarns on the installation shafts a3 are always tangent to the driving roller.
According to the preparation device, the yarn fixing ring c1 and the yarn fixing ring c2 are circular rings, the inner diameter is 2 times of the diameter of the core-spun yarn, the installation heights of the yarn fixing ring c1 and the yarn fixing ring c2 are the same, the side, far away from the installation shaft a3, of the tension device b3 is provided with the porous yarn tube, the porous yarn tube can improve the uniformity of the prepared core-spun yarn, because the outer yarn can be uniformly arranged in the porous yarn tube, and the shaking amplitude of the porous yarn tube to the outer yarn can be effectively controlled. The porous yarn tube is parallel to the core yarn between the yarn fixing ring c1 and the yarn fixing ring c2, the distance between the porous yarn tube and the core yarn is less than or equal to 5mm, preferably 1-5 mm, a plurality of circular through holes which are arranged along the straight line direction are arranged in the porous yarn tube, the diameter of each circular through hole is 1.5 times of that of the core-spun yarn, the distance between the centers of two adjacent circular through holes is 1.5-3 mm, and the distance between two outer yarns can be adjusted by passing through the hole distance on the porous yarn tube. The diameters of the circular through holes of the yarn fixing ring and the porous yarn tube are too large, so that the controllability of the shaking amplitude of the yarn is small; threading is difficult when the diameter is too small, and the structure of the yarn is worn. The interval between the porous yarn tube and the core yarn is too large, and the arrangement uniformity among different outer yarns is poor; the spacing is too small, so that the core spun yarn is easy to contact with the porous yarn tube, and abrasion is caused.
The beneficial effects are that:
(1) The continuous preparation method of the core-spun yarn effectively solves the problem that the low-strength yarn cannot be used as the outer layer yarn for coating in the prior art, and realizes the coating of the low-strength yarn serving as the outer layer yarn on the core yarn;
(2) The continuous preparation device of the core-spun yarn has a simple structure, and the porous yarn tube can improve the uniformity of the core-spun yarn and the quality of the prepared product.
(3) The continuous preparation method and the preparation device of the core-spun yarn can realize continuous coating of core yarns and outer yarns with different performances, thereby obtaining the multifunctional core-spun yarn.
Drawings
FIG. 1 is a schematic view of an apparatus for producing core-spun yarn of the present invention;
FIG. 2 is a schematic view of a porous tube of the present invention;
the device comprises a 1-core yarn fixing frame, a 2-core yarn fixing frame, a 3-outer yarn fixing frame, a 4-core yarn bobbin, a 5-core yarn bobbin, a 6-outer yarn bobbin, a 7-motor g1, an 8-motor g2, a 9-spring f1, a 10-unwinding motor, a 11-unwinding roller, a 12-spring f2, a 13-motor g3, a 14-driving roller, a 15-winding motor, a 16-winding groove bobbin, a 17-spring f3, a 18-yarn fixing ring c1, a 19-yarn fixing ring c2, a 20-tension device b1, a 21-tension device b2, a 22-tension device b3, a 23-porous yarn bobbin, a 24-core yarn, a 25-core yarn and a 26-outer yarn.
Detailed Description
The invention is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
Example 1
The preparation device of the core-spun yarn comprises a transmission device d1, a transmission device d2, a transmission device d3, a mounting shaft a1, a tension device b1 20, a yarn fixing ring c1 18, a yarn fixing ring c2 19, a tension device b2 21, a mounting shaft a2, a tension device b3 22 and a mounting shaft a3 which are sequentially arranged along the linear running direction of the core yarn 24 and the core-spun yarn 25, and the tension device b3 and the mounting shaft a3 which are positioned at one side of the linear running direction of the outer yarn 26 and are arranged from the near to the far;
the installation shafts a1, a2 and a3 are respectively arranged in the core yarn fixing frame 1, the core yarn fixing frame 2 and the outer yarn fixing frame 3 and are respectively used for installing the core yarn bobbin 4, the core yarn bobbin 5 and the outer yarn bobbin 6, the installation shafts a1 and a2 are respectively connected with a motor g 17 and a motor g 28 for driving the core yarn bobbin 4, the core yarn bobbin 5 and the outer yarn bobbin 6 to rotate around a shaft beta and a shaft epsilon, the shaft beta and the shaft epsilon are parallel to a horizontal plane and are respectively perpendicular to the central shafts of the installation shafts a1 and a2, the number of the installation shafts a1 is 3, the number of the installation shafts a2 is 2, the number of the installation shafts a1, a2 and a3 is not limited to the above, and the number of the installation shafts a1 or a3 can be 1 or more;
the core yarn fixing frame is of a -shaped structure and consists of two side plates and a bottom plate vertically connected with the two side plates, wherein the two side plates are symmetrically provided with a long-strip-shaped groove I, an installation shaft a1 is parallel to the bottom plate, two ends of the installation shaft a1 are inserted into the long-strip-shaped groove I to realize sliding connection, the ends of the two side plates far away from the bottom plate in the core yarn fixing frame are respectively connected with two ends of an installation shaft a1 nearest to the installation shaft a1 through springs f 19, the springs f1 are embedded in the long-strip-shaped groove I, the natural length of the springs f1 is larger than the distance between an unwinding roller and the ends of the two side plates far away from the bottom plate, a rotating shaft of a motor g1 is vertically connected with the bottom plate of the core yarn fixing frame, a transmission device d1 is used for driving a core yarn drum to rotate around a central shaft of the motor 10 and an unwinding roller 11 which are connected through a belt and are installed on the core yarn fixing frame, and the unwinding roller is parallel to the installation shaft a1 and is positioned between the installation shaft a1 and the bottom plate;
the structure of the outer yarn fixing frame is similar to that of the core yarn fixing frame, the difference is that a strip-shaped groove II is formed in a side plate of the outer yarn fixing frame, the ends of two side plates far away from the bottom plate are respectively connected with the two ends of a mounting shaft a3 nearest to the outer yarn fixing frame through springs f2, the springs f2 are embedded in the strip-shaped groove II, the natural length of the springs f2 is larger than the distance between a driving roller and the ends of the two side plates far away from the bottom plate, a transmission device d3 is used for driving an outer yarn drum to rotate around a central shaft of the outer yarn drum and consists of a motor g3 and a driving roller 14, the driving roller is parallel to the mounting shaft a3 and is positioned between the mounting shaft a3 and the bottom plate, and a rotating shaft of the motor g3 is connected with one end of the driving roller;
the structure of the core yarn fixing frame is similar to that of the core yarn fixing frame, the difference is that a strip-shaped groove III is formed in a side plate of the core yarn fixing frame, a rotating shaft of a motor g2 is vertically connected with a bottom plate of the core yarn fixing frame, a transmission device d2 is used for driving a core yarn drum to rotate around a central shaft of the core yarn fixing frame, the core yarn fixing frame is composed of a winding motor 15 and a winding groove drum 16 which are connected through a belt and are arranged on the core yarn fixing frame, the winding groove drum is parallel to a mounting shaft a2 and is positioned on one side of the mounting shaft a2 far away from the bottom plate, two ends of the winding groove drum and the mounting shaft a2 are respectively connected through a spring f3, and the spring f3 is embedded in the strip-shaped groove III, and the natural length of the winding groove drum is smaller than the sum of the radius of the winding groove drum and the radius of the mounting shaft;
the rotation directions of the rotation shafts of the motor g1 and the motor g2 are the same, the rotation speeds are 200-1500 revolutions per minute, the central axes of the rotation shafts of the motor g1 and the motor g2 are collinear with the axis beta and the axis epsilon, and the intersection point of the axis beta and the central axis of the installation shaft a1 and the intersection point of the axis epsilon and the central axis of the installation shaft a2 are the midpoints of the central axes of the installation shaft a1 and the installation shaft a2 respectively.
The yarn fixing ring c1 18 and the yarn fixing ring c2 19 are used for controlling the yarn shaking amplitude, the tension devices b1 20, b2 21 and b3 22 are used for guaranteeing that yarns are in a straightening state, the yarn fixing ring c1 and the yarn fixing ring c2 are circular rings, the inner diameter is 2 times of the diameter of the core-spun yarn 25, the mounting heights of the yarn fixing ring c1 and the yarn fixing ring c2 are the same, a porous yarn tube 23 shown in fig. 2 is arranged on one side, away from the mounting shaft a3, of the tension device b3, the core yarn between the porous yarn tube and the yarn fixing ring c1 and the yarn fixing ring c2 is parallel, the distance between the porous yarn tube and the core yarn is 1-5 mm, a plurality of circular through holes which are arranged along the straight direction are arranged in the porous yarn tube, the circular through holes are 1.5 times of the diameter of the core-spun yarn 25, and the distance between the centers of two adjacent circular through holes is 1.5-3 mm.
The method for continuously preparing the core-spun yarn by adopting the device comprises the following steps: in the process that the core yarn moves linearly at a uniform speed and rotates around the central shaft of the core yarn, the outer layer yarn which is actively conveyed and has the tension of 40cN is connected with the actively conveyed core yarn, and the outer layer yarn is driven to wrap the surface of the core yarn through the rotation of the core yarn to prepare the core-spun yarn; the number of the core yarn and the outer layer yarn is 1, the outer layer yarn is mulberry silk filament yarn, the diameter of the outer layer yarn is 0.5mm, the unwinding speed is 4.817 m/min, the core yarn is cotton yarn, the diameter of the outer layer yarn is 1mm, the unwinding speed is 1 m/min, and the rotating speeds of the core yarn and the core-spun yarn are 1000 revolutions/min.
The finally prepared core-spun yarn has a spiral structure, the pitch of the outer layer yarn is 0.5mm, the pitch is uniform, and the pitch CV value is 2%.
The outer layer yarn can be a common filament yarn, or a spun yarn, a nanofiber yarn or a carbon nano tube yarn, the core yarn is not limited to the common filament yarn, the spun yarn, the nanofiber yarn or the carbon nano tube yarn can be used as the core yarn of the invention, the diameters and the speeds of the core yarn and the outer layer yarn are not limited to the values given in the example, and the diameters and the speeds of the core yarn and the outer layer yarn can realize the wrapping of the low-strength yarn under the following conditions:
wherein V is 1 The unwinding speed of the core yarn is expressed in m/min, V 2 The unwinding speed of the outer layer yarn is expressed in m/min, r is the rotating speed of the core yarn, d is expressed in r/min 1 Is the diameter of the core yarn, the unit is meter, d 2 Is the diameter of the outer yarn in meters.
Example 2
The apparatus for producing a core yarn was the same as in example 1.
The method for continuously producing the core-spun yarn using the apparatus was substantially the same as in example 1, except that the tension of the outer layer yarn was 1cN, the number of the core yarn and the outer layer yarn was 3 and 1, respectively, the outer layer yarn was carbon nanotube yarn, the diameter was 0.1mm, the unwinding speed was 1.791 m/min, the 3 core yarns were carbon nanotube yarns, the diameter was 0.1mm, the unwinding speed was 1.5 m/min, and the rotational speeds of the core yarn and the core-spun yarn were 1500 rpm.
The finally prepared core-spun yarn has a spiral structure, the pitch of the outer layer yarn is 0.9mm, the pitch is uniform, and the pitch CV value is 3%.
Example 3
The apparatus for producing a core yarn was the same as in example 1.
The method for continuously preparing the core-spun yarn by using the device is basically the same as that of example 1, except that the tension of the three outer yarns is 20cN, the number of the core yarns and the outer yarns is 1 and 3 respectively, the 3 outer yarns are mulberry silk filament yarns, cotton yarns and polyacrylonitrile staple yarns, the diameters are 0.5mm, the unwinding speeds are 2.543 m/min, the core yarns are cotton yarns, the diameters are 0.5mm, the unwinding speeds are 2 m/min, and the rotational speeds of the core yarns and the core-spun yarns are 500 rpm.
The finally prepared core-spun yarn has a spiral structure, the pitch of the outer layer yarn is 0.833, the pitch is uniform, and the pitch CV value is 5%.
Example 4
The apparatus for producing a core yarn was the same as in example 1.
The method for continuously preparing the core-spun yarn by using the device is basically the same as that of the embodiment 1, except that the tension of the three outer yarns is 3cN, the number of the core yarns and the outer yarns is 1 and 3 respectively, the 3 outer yarns are nanofiber yarns, carbon nanotube yarns and nanofiber yarns respectively, the diameters are 0.2mm, the unwinding speed is 0.321 m/min, the core yarns are nanofiber yarns, the diameters are 0.2mm, the unwinding speed is 0.2 m/min, and the rotational speeds of the core yarns and the core-spun yarns are 200 revolutions/min.
The finally prepared core-spun yarn has a spiral structure, the pitch of the outer layer yarn is 0.133mm, the pitch is uniform, and the pitch CV value is 0%.
Example 5
The apparatus for producing a core yarn was the same as in example 1.
The method for continuously preparing the core-spun yarn using the apparatus was substantially the same as in example 1, except that the tension of each of the outer yarns was 5cN, the number of the core yarns and the outer yarns was 3 and 3, respectively, the 3 outer yarns were nanofiber yarns, the diameters were 0.3mm, the unwinding speed was 0.935 m/min, the 3 core yarns were cotton yarns, the diameters were 0.5mm, the unwinding speed was 0.5 m/min, and the rotational speeds of the core yarns and the core-spun yarn were 300 rpm.
The finally prepared core-spun yarn has a spiral structure, the pitch of the outer layer yarn is 0.256mm, the pitch is uniform, and the pitch CV value is 1%.

Claims (7)

1. A continuous preparation method of core-spun yarn is characterized in that: in the process that the core yarn moves linearly at a uniform speed and rotates around the central shaft of the core yarn, the outer layer yarn actively conveyed at low tension is connected with the core yarn, and the outer layer yarn is driven to be wrapped on the surface of the core yarn through the rotation of the core yarn to prepare the core-spun yarn; the low tension is 1-40 cN, and the strength of the outer layer yarn is more than 5cN;
the diameter and speed of the core yarn and the outer layer yarn satisfy the following conditions:
wherein V is 1 For unwinding speed of core yarn, V 1 0.2-2 m/min, V 2 For unwinding speed of outer yarn, V 2 Is 0.321-6.362 m/min, r is the rotation speed of the core yarn, the unit is rotation/min, d 1 Is the diameter of the core yarn, d 1 Is 0.1X10 × 10 -3 ～1×10 - 3 m，d 2 Diameter d of outer yarn 2 Is 0.1X10 × 10 -3 ～1×10 -3 m。
2. The continuous production method of core-spun yarn according to claim 1, wherein the core yarn is actively transported core yarn, the number of the core yarn and the outer layer yarn is 1 or more, the kinds of the plurality of core yarns or the plurality of outer layer yarns are the same or different, the strengths are the same or different, and the outer layer yarn and the core yarn are each independently selected from a common filament yarn, a spun yarn, a nanofiber yarn and a carbon nanotube yarn.
3. The continuous production method of a core-spun yarn of claim 1, wherein the core-spun yarn has a spiral structure, the pitch of the outer layer yarn is 0.133 to 0.9mm, and the pitch CV value is 0 to 5%.
4. A production apparatus employing a continuous production method of a covering yarn according to any one of claims 1 to 3, characterized in that: the device comprises a transmission device d1, a transmission device d2, a transmission device d3, a mounting shaft a1, a tension device b1, a yarn fixing ring c2, a tension device b2, a mounting shaft a2, a tension device b3 and a mounting shaft a3, wherein the mounting shaft a1, the tension device b1, the yarn fixing ring c2, the tension device b2, the mounting shaft a2, the tension device b3 and the mounting shaft a3 are sequentially arranged along the linear running direction of the core yarn;
the installation shaft a1, the installation shaft a2 and the installation shaft a3 are respectively used for installing a core yarn bobbin, a core-spun yarn bobbin and an outer layer yarn bobbin, the transmission device d1, the transmission device d2 and the transmission device d3 are respectively used for driving the core yarn bobbin, the core-spun yarn bobbin and the outer layer yarn bobbin to rotate around central axes of the core yarn bobbin, the installation shaft a1 and the outer layer yarn bobbin, the installation shaft a2 are respectively connected with a driving device e1 and a driving device e2 for driving the core yarn bobbin, the winding shaft β and the shaft epsilon to rotate around the shaft β and the shaft epsilon to be parallel to a horizontal plane, the shaft β and the shaft epsilon are respectively perpendicular to central axes of the installation shaft a1 and the installation shaft a2, all tension devices are used for guaranteeing that yarns are in a straightening state, and all yarn fixing rings are used for controlling the vibration amplitude of the yarns;
the installation shafts a1, a2 and a3 are respectively arranged in a core yarn fixing frame, a core yarn wrapping fixing frame and an outer yarn fixing frame, all fixing frames are -shaped structures and are composed of two side plates and a bottom plate vertically connected with the two side plates, all the installation shafts are parallel to the bottom plate and are simultaneously connected with the two side plates in a sliding mode, and the sliding connection is realized by arranging long-strip-shaped grooves on the side plates and then inserting two ends of the installation shafts into the long-strip-shaped grooves;
the transmission device d1 is composed of an unwinding motor and an unwinding roller which are connected through a belt and are arranged on the core yarn fixing frame, and the unwinding roller is parallel to the installation shaft a1 and is positioned between the installation shaft a1 and the bottom plate;
the transmission device d2 is composed of a winding motor and a winding groove drum which are connected through a belt and are arranged on the core-spun yarn fixing frame, the winding groove drum is parallel to the installation shaft a2 and is positioned on one side of the installation shaft a2 far away from the bottom plate, two ends of the winding groove drum and the installation shaft a2 are respectively connected through a spring f3, and the spring f3 is embedded in the strip-shaped groove, and the natural length of the spring f3 is smaller than the sum of the radius of the winding groove drum and the radius of the installation shaft.
5. The preparation device according to claim 4, wherein the transmission device d3 is composed of a motor g3 and a driving roller, the driving roller is parallel to the installation shaft a3 and is positioned between the installation shaft a3 and the bottom plate, and a rotating shaft of the motor g3 is connected with one end of the driving roller;
the driving device e1 and the driving device e2 are respectively a motor g1 and a motor g2, the rotating shafts of the motor g1 and the motor g2 are respectively and vertically connected with the bottom plates of the core yarn fixing frame and the covering yarn fixing frame, the rotating directions of the rotating shafts of the motor g1 and the motor g2 are the same, the rotating speeds are 200-1500 revolutions per minute, the central axes of the rotating shafts of the motor g1 and the motor g2 are collinear with an axis beta and an axis epsilon, and the intersection point of the axis beta and the central axis of the installation axis a1 and the intersection point of the axis epsilon and the central axis of the installation axis a2 are respectively the midpoints of the central axes of the installation axis a1 and the installation axis a 2.
6. The manufacturing apparatus according to claim 5, wherein the number of the installation shafts a1 is 1 or more, ends of the two side plates far from the bottom plate in the core yarn fixing frame are respectively connected with two ends of the installation shaft a1 nearest thereto through springs f1, the springs f1 are embedded in the elongated grooves and have a natural length larger than the distance between the unwinding roller and the ends of the two side plates far from the bottom plate, the number of the installation shafts a3 is 1 or more, ends of the two side plates far from the bottom plate in the outer layer yarn fixing frame are respectively connected with two ends of the installation shaft a3 nearest thereto through springs f2, and the springs f2 are embedded in the elongated grooves and have a natural length larger than the distance between the driving roller and the ends of the two side plates far from the bottom plate.
7. The preparation device according to claim 4, wherein the yarn fixing ring c1 and the yarn fixing ring c2 are circular rings, the inner diameter is 2 times of the diameter of the core spun yarn, the installation heights of the yarn fixing ring c1 and the yarn fixing ring c2 are the same, a porous yarn tube is arranged on one side of the tension device b3 far away from the installation shaft a3, the core yarn between the porous yarn tube and the yarn fixing ring c1 and the yarn fixing ring c2 is parallel, the distance between the porous yarn tube and the core yarn is less than or equal to 5mm, a plurality of circular through holes which are arranged along the straight line direction are arranged in the porous yarn tube, the diameter of each circular through hole is 1.5 times of the diameter of the core spun yarn, and the distance between the centers of two adjacent circular through holes is 1.5-3 mm.
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