CN113186638B - Weft-knitted multi-layer warp-inserted weft-inserted tubular fabric, weaving method thereof and special circular weft knitting machine - Google Patents

Weft-knitted multi-layer warp-inserted weft-inserted tubular fabric, weaving method thereof and special circular weft knitting machine Download PDF

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Publication number
CN113186638B
CN113186638B CN202110407024.9A CN202110407024A CN113186638B CN 113186638 B CN113186638 B CN 113186638B CN 202110407024 A CN202110407024 A CN 202110407024A CN 113186638 B CN113186638 B CN 113186638B
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weft
yarns
knitting
group
yarn
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CN113186638A (en
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蒋高明
高哲
周濛濛
李炳贤
顾洪阳
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Jiangnan University
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Jiangnan University
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/54—Thread guides
    • D04B15/58—Thread guides for circular knitting machines; Thread-changing devices
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/14—Needle cylinders
    • D04B15/16—Driving devices for reciprocatory action
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/18—Dials
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/322—Cam systems or assemblies for operating knitting instruments in circular knitting machines with needle cylinder and dial
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/94—Driving-gear not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

The invention discloses a weft-knitted multilayer warp-inserted weft-inserted tubular fabric, a knitting method thereof and a special circular knitting machine, belonging to the field of textiles. The circular weft knitting machine comprises a yarn feeding mechanism, a knitting mechanism, a traction and coiling mechanism, a transmission mechanism, a control mechanism, a rack and an auxiliary device; the yarn feeding mechanism comprises a rib weaving yarn, a rib front plating yarn, a rib back plating yarn, a first group of weft in-laid yarns, a second group of weft in-laid yarns, a third group of weft in-laid yarn guides and a creel, a first group of warp in-laid yarn guide discs, a second group of warp in-laid yarn guide discs and a warp in-laid creel; the transmission mechanism comprises a main transmission shaft, a dial dead axle, a middle dead axle, a needle cylinder dead axle, a dial gearwheel, a dial dead axle sleeve, a middle dead axle sleeve, a needle cylinder dead axle sleeve, a main transmission shaft sleeve, a dial belt pulley, a middle belt pulley, a needle cylinder belt pulley and the like. The invention can weave the tubular fabric with two layers of warp yarns and three layers of weft yarns, and solves the problems that the weft-knitted warp-inserted weft-inserted tubular fabric has fewer layers of warp yarns and weft yarns and is thin in thickness.

Description

Weft-knitted multi-layer warp-inserted weft-inserted tubular fabric, weaving method thereof and special circular weft knitting machine
Technical Field
The invention relates to a weft-knitted multi-layer warp-inserted weft-inserted tubular fabric, a knitting method thereof and a special circular weft knitting machine, belonging to the field of textile.
Background
With the increasing demand of the industrial field for tubular composite materials with excellent extensibility, the research on tubular fabrics and composite materials thereof is increasingly and deeply started due to the excellent mechanical properties of the weft-knitted warp-inserted weft-inserted tubular composite materials, such as excellent shock resistance and energy absorption, and the like. The existing weft-knitted warp-inserted weft-inserted tubular fabric adopts weft plain needles, rib threads and other structures as binding systems, and monofilaments or multifilaments which are arranged in parallel are inserted in a specific direction to form a tubular preform which is free of turned edges and good in formability. The tubular prefabricated body has good extensibility of a weft-knitted tubular fabric and mechanical property along a lining yarn direction, and a tubular composite material prepared by the fabric has excellent in-plane mechanical property and tear resistance. As a novel tubular textile preform, the composite material has excellent formability and structural integrity, is particularly suitable for development of tubular composite material base cloth, and has wide application prospect. However, the existing weft-knitted warp-inserted and weft-inserted tubular fabric is thin in thickness, so that the mechanical property of the existing weft-knitted warp-inserted and weft-inserted tubular fabric along the thickness direction is poor, and the application of the existing weft-knitted warp-inserted and weft-inserted tubular fabric in the industrial field is limited.
The existing weft-knitted warp-inserted weft-inserted tubular fabric has two preparation methods: firstly, directly preparing a weft-knitted warp-inserting and weft-inserting tubular fabric by adopting a flat knitting machine or a circular knitting machine; and secondly, the sheet warp-lining weft-insertion fabric prepared by the flat knitting machine is deformed into a required tubular material under the action of a mould.
At present, the flat knitting machine weaves fewer warp-lining weft-insertion tubular fabrics, and most of the warp-lining weft-insertion tubular fabrics are sheet-shaped warp-lining weft-insertion fabrics. Chinese patent No. CN00267570.6 describes a biaxial multilayer lining yarn weft-knitted fabric, which uses 1+1 rib as a binding system, and is lined with multilayer lining warp yarns and lining weft yarns, and at most 5 layers of lining yarns can be lined at present; the chinese patent No. CN200810039656.9 describes a multi-layer weft-inserted woven-knitted composite structure, which uses 1+1 rib as a binding system to insert two sets of warp yarns and six weft yarns, and compared with the original woven-knitted composite structure, the thickness of the fabric is increased by increasing the number of layers of the weft yarns; the biaxial reinforced weft knitting interval knitted fabric disclosed in Chinese patent No. CN200410018041.X comprises two weft plain binding systems, a group of interval yarns, two groups of weft yarns and two groups of warp yarns, and the thickness of the fabric is increased by adjusting the interval distance. However, the weft-knitted warp-inserted weft-inserted fabrics are all sheet fabrics, and material waste and uneven fabric structures are easily caused by cutting and splicing in the process of preparing the tubular composite material. The near-forming warp-inserted weft-inserted tubular fabric can be prepared by adopting a circular weft knitting machine, wherein the warp-inserted weft-inserted circular weft knitting machine is developed in enterprises and colleges such as Collins crafts company, Donghua university, Tianjin industry university, Jiangnan university and the like of south China. The Chinese patent with the patent number of CN201410723288.5 is a cylindrical biaxial weft-knitted three-dimensional knitting structure, which comprises two weft flat binding systems, a group of spacing yarns, two groups of weft insertion yarns and a group of warp insertion yarns, wherein the prepared fabric is warp insertion weft insertion tubular fabric; the weft-knitted warp-lined tubular fabric is characterized in that a layer of warp and a layer of weft are lined in the knitting process by using a weft plain needle as a binding system, wherein the weft-knitted warp-lined tubular fabric is described in an article of 'development of cylindrical weft-knitted biaxial high-strength polyethylene fabric and processing equipment thereof', which is prepared by 9 th file of 7 th date in 2009 of Liuliansen, Qiu Guanxiong, Jiangyiming and the like in the textile school newspaper, and the weft-knitted warp-lined tubular fabric is provided with a layer of warp and a layer of weft in the knitting process; in a weft-knitted warp-lined weft-lined tubular fabric which is disclosed in a plain paper of Shanghai characters, namely weft-knitted biaxial seamless air filter material preparation and performance research and a plain paper of knitted tubular air filter material structure and filter performance research, published in 2020, a layer of warp and a layer of weft are lined in a knitting process by taking 1+1 rib patterns as a binding system. The lining yarn technology of the weft-knitted warp-lined and weft-lined tubular fabric solves the problem that lining warp yarns are difficult to be lined in the weft-knitted tubular fabric, but limits the multilayer lining warp yarns and the lining weft yarns to be lined in the weft-knitted tubular fabric due to the limitation of a knitting mechanism.
Disclosure of Invention
[ problem ] to
The problems that materials are wasted and the fabric structure is uneven easily caused by cutting and splicing existing in the prior tubular composite material prepared by adopting a warp-inserting and weft-inserting fabric woven by a flat knitting machine and the problems that the number of inserted warp yarns and weft yarns is small and the thickness is thin due to the limitation of a circular weft knitting machine existing in the warp-inserting and weft-inserting tubular fabric woven by adopting the prior weft-knitting warp-inserting and weft-inserting circular weft knitting machine exist.
[ solution ]
In order to solve at least one problem, the invention improves the yarn feeding mechanism, the weaving mechanism and the transmission mechanism of the existing weft-knitted warp-inserting weft-inserting circular weft insertion machine, so that tubular fabrics inserted with two layers of warp yarns and three layers of weft yarns can be woven, and the problems of small number of layers and thin thickness of the warp yarns and the weft yarns of the weft-knitted warp-inserting weft-inserting tubular fabrics are solved.
The invention provides a circular weft knitting machine for weft insertion tubular fabrics, which comprises a yarn feeding mechanism, a knitting mechanism, a traction and coiling mechanism, a transmission mechanism, a control mechanism, a frame and an auxiliary device; the yarn feeding mechanism comprises a rib weaving yarn, a rib front plating yarn, a rib back plating yarn, a first group of weft in-laid yarns, a second group of weft in-laid yarns, a third group of weft in-laid yarn guides and a creel, wherein the first group of warp in-laid yarn guide discs, the second group of warp in-laid yarn guide discs and the warp in-laid creel; the transmission mechanism comprises a main transmission shaft, a dial dead axle, a middle dead axle, a needle cylinder dead axle, a dial gearwheel, a dial dead axle shaft sleeve, a middle dead axle shaft sleeve, a needle cylinder dead axle shaft sleeve, a main transmission shaft sleeve, a dial belt pulley, a middle belt pulley, a needle cylinder belt pulley and the like.
In one embodiment of the invention, the yarn guide nozzles of the first group of weft-inserted yarn guides and the rib front plating yarn guides in the yarn feeding mechanism are close to the needle cylinder, are parallel to the height of the needle cylinder, and are sequentially arranged on a needle cylinder creel along the knitting direction; the yarn guide nozzles of the knitting yarn guide and the second group of weft insertion yarn guide are close to the position between the dial and the needle cylinder and are sequentially arranged on the middle creel along the knitting direction; the yarn guide nozzles of the third group of weft inserted yarn guide and rib reverse plating yarn guide are close to the dial, are parallel to the lower bottom surface of the dial and are sequentially arranged on the dial creel along the knitting direction; the dial creel, the middle creel and the needle cylinder creel are respectively connected with the dial fixed shaft sleeve, the middle fixed shaft sleeve and the needle cylinder fixed shaft sleeve; the first group of lining warp yarn guide discs and the second group of lining warp yarn guide discs are respectively connected with support columns of the circular weft knitting machine, and yarn guide holes are uniformly distributed on the first group of lining warp yarn guide discs and the second group of lining warp yarn guide discs; the yarn guide holes of the first group of lining warp yarn guide discs are parallel to the needle cylinder, and the yarn guide holes of the second group of lining warp yarn guide discs are parallel to the periphery of the needle disc.
In one embodiment of the invention, the yarn feeding mechanism conveys the yarn unwound from the yarn cylinder to a knitting area, specifically, a first group of warp lining yarns passes through yarn guide holes on a first group of warp lining yarn guide discs and is padded into the knitting area along a gap between two knitting needles of the needle cylinder; the yarn guide holes of the second group of warp lining yarn guide discs are parallel to the periphery of the dial, and the second group of warp lining yarns unwound from the yarn barrel of the warp lining yarn frame pass through the yarn guide holes on the second group of warp lining yarn guide discs and are padded into a knitting area along a gap between two knitting needles of the dial; a third group of weft inserted yarns and rib reverse plating yarns positioned on a dial creel are unwound from the yarn cylinder and are padded into a weaving area through yarn guide holes of respective yarn guides; the weaving yarn and the second group of weft insertion yarns positioned on the middle creel are unwound from the yarn cylinder and are padded into a weaving area through the yarn guide holes of the respective yarn guides; the first set of weft inserted yarns, rib face plating, located on the cylinder creel is unwound from the bobbin and inserted into the knitting area through the guide holes of the respective guides. The dial creel, the dial yarn guide frame, the middle creel and the needle cylinder creel which are connected with the fixed shaft sleeve synchronously rotate along the knitting direction along with the rotation of the triangular seats of the dial and the needle cylinder under the drive of respective belt pulleys. The spacing between the third group of weft-in threads and the rib reverse plating lining fabric is reduced due to the lining of the second group of warp lining threads, the spacing is a gap between the second group of warp lining threads and a dial, a special type of yarn guide or a yarn guide needle can be adopted, and the third group of weft-in threads and the rib reverse plating lining fabric is lined into the fabric by adjusting the yarn laying angle. Meanwhile, in order to enable each group of yarns to enter the fabric accurately, the yarn guide of each group of yarns can be specially processed, and then the yarns are accurately inserted into the fabric in combination with adjustment of yarn padding angles.
In one embodiment of the present invention, the angle at which each set of yarns in the yarn feeding mechanism is inserted into the knitting mechanism is defined as a knitting longitudinal angle β by an angle between the yarns and the knitting direction, as a knitting traverse angle α by a direction in which the yarns and the cylinder needles are arranged, and the ranges of variation of the knitting longitudinal angle β and the knitting traverse angle α are from 0 ° to 90 °, so that the knitting longitudinal angles of the knitting yarns, the rib face plating, the rib back plating, the first set of weft in-laid yarns, the second set of weft in-laid yarns, and the third set of weft in-laid yarns are respectively defined as β1、β2、β3、β4、β5、β6The knitting transverse angles are respectively alpha1、α2、α3、α4、α5、α6(ii) a The first set of weft inserted yarns, rib front plating proximate to the first set of warp inserted yarns, having a weaving draft angle alpha4<α2Knitting longitudinal angle beta4、β2Parallel to the direction of weaving, approximately 0 °; the third group of weft insertion yarns and rib back plating yarns are close to the second group of warp insertion yarns, and the weaving transverse angle alpha of the third group of weft insertion yarns and the rib back plating yarns is6、α3Parallel to the arrangement direction of the cylinder needles, approximately 0 DEG, and a longitudinal knitting angle beta6<β3(ii) a The first group of weft-inserted yarn guides and the third group of weft-inserted yarn guides are parallel in position, and the positions of the yarn guides plated on the front side of the rib and plated on the back side of the rib are parallel; the yarn carrier of the weaving yarn is positioned between the first group of weft-inserted yarns and the rib front plating yarn carrier, and the weaving transverse angle alpha of the weaving yarn1Knitting transverse angle alpha between first set of weft insertion yarns and rib front plating4、α2Is between, i.e. alpha4<α1<α2Transverse angle of knitting of beta1Knitting longitudinal angle beta between third group of weft inserted yarns and rib reverse plating6、β3Is between, i.e. beta6<β1<β3(ii) a The second group of weft-inserted yarn carriers are positioned at the position where the last dial needle is parallel when completing a cycle of knitting and the knitting transverse angle alpha is5Having a size similar to the weaving transverse angle alpha of the first set of weft inserted yarns4Knitting longitudinal angle beta5Parallel to the direction of weaving, approximately 0 °.
In one embodiment of the present invention, the knitting mechanism is a knitting mechanism for knitting a yarn laid in a knitting area into a tubular knitted fabric by operation of a knitting machine member including a dial, a cylinder, dial needles, cylinder needles, dial cams, cylinder cams, dial cams, and cylinder cams, the dial cams being connected to the dial cams by screws, the dial cams being connected to the dial cams by screw-dial dead axle sleeves; the needle cylinder triangle is connected with the needle cylinder triangle seat through a screw, and the needle cylinder triangle seat is connected with the needle cylinder fixed shaft sleeve through a screw.
In one embodiment of the invention, a dial knitting needle in a knitting mechanism is used for knitting a rib back side coil and a rib back side plated coil along with the rotation of a dial triangle, and simultaneously, a third group of inserted weft insertion yarns, a second group of inserted warp insertion yarns and a second group of inserted weft insertion yarns are inserted into a fabric; the needle cylinder knitting needle weaves the rib front side stitch and the rib front side plated stitch along with the rotation of the needle cylinder triangle, and simultaneously, the padded first group of weft insertion yarns and the padded first group of warp insertion yarns are inserted into the fabric. The dial cam and the needle cylinder cam synchronously rotate along the knitting direction under the action of the transmission mechanism, and are cooperated with each mechanism to knit the weft-knitted multi-layer warp-inserted weft-inserted tubular fabric.
In one embodiment of the invention, the drawing and winding mechanism is used for drawing the tubular fabric formed by weaving the weaving area to form a package with a certain shape, and comprises a drawing and winding rack, a direct current torque motor, a drawing roller, two press rollers, a cloth roller, a speed adjusting button and an emergency stop button. The traction roller and the two compression rollers are arranged on the traction coiling frame, the traction roller is driven by the direct-current torque motor to actively rotate, and the two compression rollers are driven to passively rotate under the action of the traction roller; the drawing rollers are positioned at the same side of the two compression rollers, and the surface speeds of the three rollers are the same. The tubular fabric is drawn by the action of a drawing roll and two press rolls and then formed into a certain package on a cloth roll.
In one embodiment of the invention, the transmission mechanism transmits the power of the motor to the knitting mechanism, the yarn feeding mechanism and the drawing and winding mechanism, and comprises a squirrel-cage three-phase alternating current asynchronous motor, a main transmission shaft, a dial dead axle, a middle dead axle, a needle cylinder dead axle, a dial gear wheel, a dial dead axle sleeve, a middle dead axle sleeve, a needle cylinder dead axle sleeve, a main transmission shaft sleeve, a dial belt pulley, a middle belt pulley, a needle cylinder belt pulley and the like, wherein the drawing and winding mechanism is independently configured with a special motor. The main transmission shaft is connected with a squirrel-cage three-phase alternating current asynchronous motor, the upper part, the middle part and the lower part of the main transmission shaft are respectively provided with a main transmission shaft sleeve, a bearing is arranged between a needle dial fixed shaft and the needle dial fixed shaft sleeve, the needle dial fixed shaft sleeve is connected with a needle dial big gear, and a needle dial belt pulley is connected with the needle dial fixed shaft sleeve and the upper main transmission shaft sleeve; a bearing is arranged between the middle fixed shaft and the middle fixed shaft sleeve, and the middle belt pulley is connected with the middle fixed shaft sleeve and the middle main transmission shaft sleeve; a bearing is arranged between the needle cylinder fixed shaft and the needle cylinder fixed shaft sleeve, and the needle cylinder belt pulley is connected with the needle cylinder fixed shaft sleeve and the lower main transmission shaft sleeve; the outer diameters and the heights of the dial gearwheel, the middle fixed shaft sleeve and the needle cylinder fixed shaft sleeve are the same; the dial belt pulley, the middle belt pulley and the needle cylinder belt pulley are arranged in parallel along the vertical direction; the squirrel-cage three-phase alternating current asynchronous motor transmits power to the main transmission shaft, and the main transmission shaft rotates to drive the dial fixed shaft sleeve, the middle fixed shaft sleeve and the needle cylinder fixed shaft sleeve to synchronously rotate, so that the dial creel, the dial yarn carrier frame and the dial triangle which are fixed on the dial fixed shaft sleeve synchronously rotate with the needle cylinder creel and the needle cylinder triangle which are fixed on the needle cylinder fixed shaft sleeve. The traction and winding mechanism transmission mechanism keeps the traction and winding mechanism (a traction roller, a cloth roller and the like) and the dial needle cylinder in synchronization.
In one embodiment of the present invention, the transmission mechanism adopts a dial belt pulley, an intermediate belt pulley, and a needle cylinder belt pulley to synchronously rotate under the action of the main transmission shaft, so as to drive the dial fixed shaft sleeve, the intermediate fixed shaft sleeve, and the needle cylinder fixed shaft sleeve to synchronously rotate.
In one embodiment of the invention, the control mechanism is used for controlling the operation and speed of the transmission mechanism and the pulling and winding mechanism and comprises an electric appliance control box and an operation panel. The electric control box comprises a circular weft knitting machine starting and stopping control device, an operation speed control device and a traction and coiling mechanism operation control device; the operation panel comprises a central control unit and an integrated control system. The electric appliance control box is provided with a circular knitting machine starting and stopping control button and a running speed adjusting button. The central control unit of the operation panel and the integrated control system are used for uniformly regulating and controlling the normal operation of the circular knitting machine.
In an embodiment of the invention, the rack comprises a fixed yarn feeding mechanism, a weaving mechanism, a drawing and winding mechanism, a transmission mechanism and a control mechanism, and the rack ensures the stability of the whole structure of the circular knitting machine and comprises a circular knitting machine top cover, a support pillar, a rack table surface, a dial fixed-axis support frame and the like. The top cover of the circular knitting machine is arranged above the support column, and a dial synchronous belt wheel, a fixed dial dead axle shaft sleeve and a dial large gear are arranged above the top cover; the needle dial fixed shaft supporting frame is arranged above the top cover of the circular knitting machine and used for fixing the needle dial fixed shaft; the table top of the frame is arranged below the needle cylinder synchronous belt wheel, is connected with the support column and fixes the needle cylinder fixed shaft sleeve. The drawing and coiling mechanism is positioned below the table surface of the frame and is kept stable through the drawing and coiling frame connected with the support frame of the circular knitting machine.
In one embodiment of the present invention, the auxiliary device is an additional device for ensuring smooth weaving of the tubular fabric, and comprises a detection stop device, an oil adding and dust removing device, and the like. The detection automatic stop device comprises a missing needle and damaged needle automatic stop device, a roving knot automatic stop device, a broken yarn automatic stop device, a tension automatic stop device and the like; the oil adding and dust removing device comprises an automatic oil adding device, a dust removing and cleaning device and the like.
The second purpose of the invention is to provide a method for weaving a weft-knitted multi-layer warp-inserted weft-inserted tubular fabric by using the circular weft knitting machine, wherein the order of yarn padding into a weaving area in the weaving process is rib weaving yarn, rib front plating yarn, a first group of weft insertion yarns, a first group of warp insertion yarns, rib back plating yarn, a third group of weft insertion yarns, a second group of warp insertion yarns and a second group of weft insertion yarns.
In one embodiment of the present invention, the method comprises the steps of:
(1) ring withdrawing: the dial cam and the needle cylinder cam synchronously rotate, the dial knitting needle and the needle cylinder knitting needle respectively move to the outermost position and the highest position from the initial position under the action of the needle lifting cam, and old loops (old rib loops and plated loops) on the dial knitting needle and the needle cylinder knitting needle are withdrawn from a hook to a needle rod to finish loop withdrawal;
(2) yarn laying: the dial knitting needle and the needle cylinder knitting needle gradually move inwards and downwards under the action of the needle pressing triangle respectively; plating on the front side of the rib, padding the rib knitting yarns into a needle hook of a needle cylinder, slightly lifting the needle cylinder, releasing a part of rib knitting yarns at the moment, padding the rib knitting yarns into a needle hook of a dial knitting needle together with plating on the back side of the rib, and continuously moving the dial knitting needle and the needle cylinder knitting needle inwards and downwards respectively; the first group of weft insertion yarns are padded into the knitting area along the needle back of the needle cylinder knitting needle, and the third group of weft insertion yarns are padded into the knitting area along the needle back of the needle dial knitting needle; the first group of lining warp yarns are padded into a knitting area along a gap between two knitting needles of the needle cylinder and are blocked in the fabric by the first group of lining weft yarns; the second group of lining warp yarns are padded into a knitting area along a gap between two knitting needles of the dial, and are blocked in the fabric by the third group of lining weft yarns; the second group of weft insertion yarns are padded between the first group of lining warp yarns and the second group of lining warp yarns along the needle backs of the knitting needles of the dial; the first group of weft-inserted yarns are clamped by the first group of weft-inserted yarns and the second group of weft-inserted yarns, and the second group of warp-inserted yarns are clamped by the second group of weft-inserted yarns and the third group of weft-inserted yarns;
(3) closing the opening: the dial knitting needles and the cylinder knitting needles continuously move inwards and downwards respectively, and the old coils close the latch of the dial knitting needles and the cylinder knitting needles;
(4) looping, yarn bending, looping and drawing: the dial knitting needle and the needle cylinder knitting needle are respectively moved to the innermost position of the dial and the lowest position of the needle cylinder, loop looping, yarn bending and loop releasing are sequentially completed, new coils (new rib coils and plating coils) are formed, and the weft-knitted multi-layer warp-lining weft-inserting tubular fabric is formed under the action of a drawing mechanism.
The third object of the invention is a weft-knitted multi-layer warp-inserted weft-inserted tubular fabric knitted by the method of the invention.
The weft-knitted multilayer warp-lined weft-inserted tubular fabric can be at least provided with two layers of lining yarns (at most five layers of lining yarns), so that the weft-knitted multilayer warp-lined weft-inserted tubular fabric is called as a WMBNT (woven-ribbed warp-lined multilayer weft-lined weft-inserted tubular fabric for short), and comprises a rib binding system, rib front plating yarns, rib back plating yarns, a first group of lining warp yarns, a second group of lining warp yarns, a first group of lining weft yarns, a second group of lining weft yarns and a third group of lining weft yarns.
In one embodiment of the invention, the weft-knitted multilayer warp-inserted weft-inserted tubular fabric has a binding system of 1+1 rib, the rib tissue is composed of a front coil and a back coil which are alternately connected into a whole through the front coil and the back coil through respective corresponding sinker arcs in each coil row; the rib front plating is fed by a rib front plating yarn guide, is positioned right in front of the rib front coil and is tightly attached to the rib front coil, and the plating sinking arc is connected with the adjacent rib front coil; the plating on the back side of the rib is fed by a plating yarn carrier on the back side of the rib, is positioned right behind the coil on the back side of the rib and is tightly attached to the coil on the back side of the rib, and the plating settling arc is connected with the adjacent coil on the back side of the rib; the first group of lining warp yarns are vertically lined between every two front side coils, and are positioned right in front of the back side coils and behind the plating sinker loops on the front sides; the second group of lining warp yarns are vertically lined between every two back side coils, and are right behind the front side coils and in front of the back side plated sinker loops; meanwhile, a first group of lining warp yarns and a second group of lining warp yarns are respectively lined between two adjacent sinker loops of the rib stitch, and three groups of weft yarns are respectively lined in the same stitch row; the first group of weft insertion yarns, the second group of weft insertion yarns and the third group of weft insertion yarns are fed by respective yarn guides, and the first group of weft insertion yarns are covered by the front side coils and the front side plated columns and are blocked in front of the first group of warp insertion yarns; the second group of weft-in yarns are fed by the second group of weft-in yarn guides and are positioned between the first group of warp-in yarns and the second group of warp-in yarns; the third group of weft insertion yarns are fed by the third group of weft insertion yarn guide, covered by the back side loops and the loop columns plated on the back side and blocked behind the second group of warp insertion yarns. In summary, the yarn positions of the weft-knitted multilayer warp-inserted weft-inserted tubular fabric are rib front plating, rib front stitch, first group of weft insertion yarns, first group of warp insertion yarns, second group of weft insertion yarns, second group of warp insertion yarns, third group of weft insertion yarns, rib back stitch and rib back plating respectively from front to back, wherein the rib stitch, the rib front plating, the rib back plating and the three groups of weft insertion yarns spirally rise along the knitting direction of the fabric, so that the fabric forms a closed tubular structure.
In one embodiment of the invention, the weft-knitted multilayer warp-inserted weft-inserted tubular fabric is a binding system with 1+1 rib, and the weave is formed by 8 systems of yarns, namely rib knitting yarns, rib front plating yarns, rib back plating yarns, a first set of lining warp yarns, a second set of lining warp yarns, a first set of weft insertion yarns, a second set of weft insertion yarns and a third set of weft insertion yarns, wherein the lining warp yarns and the weft insertion yarns do not participate in knitting, are inserted into the rib plating weave in a parallel and straight manner, and simultaneously, three sets of weft insertion yarns are inserted above the sinker loops of each rib stitch and are clamped by loop columns of the rib front stitch and the rib back stitch.
In one embodiment of the invention, the produced weft-knitted multi-layer warp-inserted weft-inserted tubular fabric comprises only one layer of weft-inserted yarns and one layer of weft-inserted yarns, namely when the weaving is carried out by using rib weaving yarns, rib front plating yarns, rib back plating yarns, a first group of weft-inserted yarns and a first group of weft-inserted yarns, the rib back plating yarns can be positioned right in front of or right behind the rib back stitches. When the rib back plating is positioned right in front of the rib back stitch, the yarn positions of the weft-knitted multi-layer warp-inserted weft-inserted tubular fabric are respectively rib front plating, rib front stitch, a first group of weft insertion yarns, a first group of warp insertion yarns, rib back plating and rib back stitch from front to back; when the rib back plating is positioned right behind the rib back stitch, the yarn positions of the weft-knitted multi-layer warp-inserted weft-inserted tubular fabric are respectively the rib front plating, the rib front stitch, the first group of weft-inserted yarns, the first group of warp-inserted yarns, the rib back stitch and the rib back plating from front to back.
[ advantageous effects ]
(1) The weft-knitted multilayer warp-inserted weft-inserted tubular fabric has good structural stability and larger thickness, and comprises the weft-knitted single-layer weft-inserted tubular fabric, the weft-knitted single-layer weft-inserted tubular fabric, the two-layer to five-layer weft-inserted warp-inserted weft-inserted tubular fabric and the like.
(2) The three groups of synchronous belt pulleys in the weft-knitted multilayer warp-inserted weft-inserted circular knitting machine can enable yarns of the yarn feeding mechanism to be accurately padded into the knitting mechanism, and meanwhile, the knitting of the weft-knitted multilayer warp-inserted weft-inserted tubular fabric is realized through the coordination and the coordination of all the mechanisms.
(3) The weft knitting multi-layer warp inserting and weft inserting circular knitting machine is suitable for knitting and inserting of various yarns, the knitting yarns and the plating yarns can be yarns with good knitting performance, fine yarn count, high breaking strength and high shearing strength, and the knitting yarns and the plating yarns can be selected correspondingly if special use requirements exist; the lining warp yarns and the lining weft yarns can adopt high-performance fibers with thick yarn counts, such as high-strength glass fibers, high-strength high-modulus polyethylene fibers, aramid fibers, carbon fibers and the like, so as to meet the requirements of the tubular composite material on the weft-knitted multi-layer lining warp lining weft insertion tubular base cloth.
(4) The weaving method is suitable for weaving weft-knitted multilayer warp-inserted and weft-inserted tubular fabrics, tubular fabrics with different warp and weft densities and different thicknesses can be prepared by adjusting the number and the type of the warp and weft insertion yarns, and the prepared fabrics have compact and stable structures.
(5) The method is suitable for preparing the weft-knitted warp-inserted weft-inserted tubular fabric with smaller circumferential elasticity and stronger stability by increasing the plating structure, and simultaneously effectively reduces the phenomena of exposed and buckled lining warps and weft after the fabric is shrivelled off a machine. The rib front stitch, the rib back stitch, the front plating and the back plating cooperate to clamp the weft insertion yarns and the warp insertion yarns to form a stable weft knitting interval structure, so that the weft-knitted multilayer warp insertion and weft insertion tubular fabric has excellent mechanical properties of the warp insertion and weft insertion fabrics and excellent in-plane mechanical properties of the weft-knitted interval fabric.
(6) According to the invention, the multi-layer parallel lining warp yarns and the lining weft yarns are simultaneously lined in the rib plating binding system, so that the mechanical properties of the weft-knitted multi-layer warp-lining weft-lining tubular fabric and the composite material thereof in the circumferential direction, the axial direction and the thickness direction of the tubular fabric are improved to a certain extent, and the special use requirements of the tubular composite material can be met.
(7) On the basis of ensuring the structural stability of the tubular fabric, the density of the weft-knitted warp-inserted weft-inserted tubular fabric can be adjusted within a certain range by adjusting the process. Because the rib plating binding system has certain stability, when the lining warp yarns and the lining weft yarns are thin, the tubular fabric still has certain structural stability.
Drawings
FIG. 1 is a perspective view of a warp inserting and weft inserting circular knitting machine;
FIG. 2 is a left side schematic view of a warp inserting and weft inserting circular weft knitting machine;
FIG. 3 is a right side view of the warp inserting and weft inserting circular knitting machine;
FIG. 4 is a schematic top view of a warp inserting and weft inserting circular knitting machine;
FIG. 5 is a schematic view of a yarn feeding mechanism of the warp inserting and weft inserting circular knitting machine;
FIG. 6 is a schematic view of a transmission mechanism of a warp inserting and weft inserting circular weft knitting machine;
FIG. 7 is a schematic diagram of a weft knitted multi-layer warp-inserted weft-inserted plated tubular fabric;
FIG. 8 is a flat developed elevation view of a weft knitted multi-layer warp inserted weft inserted plated tubular fabric;
FIG. 9 is a flat developed side view of a weft knitted multi-layer warp inserted weft inserted plated tubular fabric;
FIG. 10 is a top plan view in plan development of the weft knitted multi-layer warp inserted weft inserted plated tubular fabric;
FIG. 11 is a diagram of an arrangement of weft inserted warp and weft inserted yarns of a weft knitted multi-layer warp inserted weft plated tubular fabric;
wherein, in the multilayer warp insertion weft insertion circular knitting machine, the yarn feeding mechanism comprises: 1-1 parts of knitting yarn guide, 1-2 parts of rib front plating yarn guide, 1-3 parts of rib back plating yarn guide, 1-4 parts of first group weft insertion yarn guide, 1-5 parts of second group weft insertion yarn guide, 1-6 parts of third group weft insertion yarn guide, 1-7 parts of first group warp insertion yarn guide disc, 1-8 parts of second group warp insertion yarn guide disc, 1-9 parts of dial creel, 1-10 parts of intermediate creel, 1-11 parts of needle cylinder creel and 1-12 parts of dial yarn guide frame;
a weaving mechanism: 2-1 parts of a dial, 2-2 parts of a needle cylinder, 2-3 parts of dial needles, 2-4 parts of needle cylinder needles, 2-5 parts of dial triangular seats and 2-6 parts of needle cylinder triangular seats;
a drawing and coiling mechanism: the device comprises a drawing and coiling rack 3-1, a direct current torque motor 3-2, a drawing roller 3-3, a press roller A3-4, a press roller B3-4', a cloth roller 3-5, a speed adjusting button 3-6 and an emergency braking button 3-7;
the transmission mechanism is as follows: 4-1 parts of a squirrel-cage three-phase alternating current asynchronous motor, 4-2 parts of a main transmission shaft, 4-3 parts of a dial dead axle, 4-4 parts of a middle dead axle, 4-5 parts of a needle cylinder dead axle, 4-6 parts of a dial gear wheel, 4-7 parts of a dial dead axle sleeve, 4-8 parts of a middle dead axle sleeve, 4-9 parts of a needle cylinder dead axle sleeve, 4-10 parts of a main transmission shaft sleeve, 4-11 parts of a dial belt pulley, 4-12 parts of a middle belt pulley and 4-13 parts of a needle cylinder belt pulley;
a control mechanism: an electric appliance control box 5-1, an operation panel 5-2, a circular knitting machine starting button 5-3, a circular knitting machine stopping button 5-4 and a circular knitting machine running speed adjusting button 5-5;
a frame: a circular knitting machine top cover 6-1, a circular knitting machine support column 6-2, a circular knitting machine rack table 6-3 and a dial fixed shaft support frame 6-4;
in the weaving principle of the weft-knitted multilayer warp-inserted weft-inserted plated fabric, 7-1 'of rib front side stitches (old), 7-2' of rib back side stitches (old), 8 'of rib front side plating (old) and 9' of rib back side plating (old);
in the weft-knitted multilayer warp-lining weft-insertion plated fabric structure, a 1+1 rib weave comprises rib front side coils 7-1, rib back side coils 7-2, rib front side coil loop columns 7-3, rib back side coil loop columns 7-4, rib front side coil needle loops 7-5, rib back side coil needle loops 7-6 and rib coil settlement loops 7-7; plating 8 on the front surface of the rib, plating 8-1 on the loop columns on the front surface, plating 8-2 on the knitting needles on the front surface, and plating 8-3 on the sinker loops on the front surface; plating 9 on the reverse side of the rib, plating 9-1 on the loop columns on the reverse side, plating 9-2 on the needle knitting arcs on the reverse side, and plating 9-3 on the reverse side; a first set of weft inserted yarns 10, a second set of warp inserted yarns 11, a first set of weft inserted yarns 12, a second set of weft inserted yarns 13 and a third set of weft inserted yarns 14.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of better illustrating the invention and is not intended to limit the invention thereto.
Example 1
A circular weft knitting machine for weft-knitted multi-layer warp-inserting and weft-inserting tubular fabrics is shown in figures 1-6 and comprises a yarn feeding mechanism, a knitting mechanism, a traction coiling mechanism, a transmission mechanism, a control mechanism, a rack and an auxiliary device;
a yarn feeding mechanism: 1-1 part of knitting yarn guide, 1-2 parts of rib front plating yarn guide, 1-3 parts of rib back plating yarn guide, 1-4 parts of first group weft insertion yarn guide, 1-5 parts of second group weft insertion yarn guide, 1-6 parts of third group weft insertion yarn guide, 1-7 parts of first group warp insertion yarn guide disc, 1-8 parts of second group warp insertion yarn guide disc, 1-9 parts of dial creel, 1-10 parts of intermediate creel, 1-11 parts of needle cylinder creel and 1-12 parts of dial yarn guide frame. The first group of weft-inserted yarns 12, the bobbin of the rib front plating 8 and the yarn guides 1-4, 1-2 thereof are arranged in sequence along the weaving directionThe yarn guiding devices are arranged on needle cylinder creels 1-11, the needle cylinder creels 1-11 are connected with needle cylinder fixed shaft sleeves 4-9, and yarn guiding mouths of yarn guiding devices 1-4 and 1-2 are close to the needle cylinder 2-2 and are parallel to the needle cylinder 2-2 in height; the rib knitting yarns 7, the yarn cylinders of the second group of weft-inserted yarns 13 and the yarn guides 1-1 and 1-5 thereof are sequentially arranged on the middle creel 1-10 along the knitting direction and are connected with the middle fixed shaft sleeve 4-8, and the yarn guide mouths of the yarn guides 1-1 and 1-5 are close to the position between the dial 2-1 and the needle cylinder 2-2; the third group of weft inserted yarns 14 and the yarn cylinders of the rib reverse plating yarn 9 are sequentially arranged on the dial yarn carriers 1-9 along the knitting direction, the yarn guides 1-6 and 1-3 are sequentially arranged on the dial yarn carrier frames 1-12 along the knitting direction, the dial yarn carriers 1-9 and the dial yarn carrier frames 1-12 are respectively connected with the dial fixed shaft sleeves 4-7, the yarn guide mouths of the yarn guides 1-6 and 1-3 are close to the dial 2-1 and are kept parallel to the lower bottom surface of the dial 2-1; the first group of lining warp yarn guide discs 1-7 are connected with a support frame 6-2 of the circular weft knitting machine, and the yarn guide holes of the first group of lining warp yarn guide discs are parallel to the needle cylinder 2-2; the second group of lining warp yarn guide discs 1-8 are connected with a support frame 6-2 of the circular weft knitting machine, the yarn guide holes of the second group of lining warp yarn guide discs are parallel to the periphery of the dial 2-1, and yarns are unwound from a dial creel 1-9, a middle creel 1-10, a needle cylinder creel 1-11 and a lining warp yarn creel and are padded into a knitting area. Wherein, the first group of weft-inserted yarns 12 and the rib front plating yarns 8 are unwound from the dial yarn frames 1-9 and are respectively padded into a weaving area through the first group of weft-inserted yarn guides 1-4 and the rib front plating yarn guides 1-2 on the dial yarn guide frames 1-12; the rib knitting yarns 7 and the second group of weft-in yarns 13 are unwound from the middle creels 1-10 and are respectively padded into a knitting area through knitting yarn feeders 1-1 and a second group of weft-in yarn feeders 1-5; the third group of weft inserted yarns 14 and the rib back plating yarns 9 are unwound from the needle cylinder creels 1 to 11 and are respectively padded into a knitting area through the third group of weft inserted yarn feeders 1 to 6 and the rib back plating yarn feeders 1 to 3; a first group of lining warp yarns 10 are unwound from a lining warp yarn creel, pass through yarn guide holes of a first group of lining warp yarn guide discs 1-7, are padded into a knitting mechanism 2 along a direction vertical to a needle cylinder 2-2, and are padded into a knitting area along a gap between two knitting needles 2-4 of the needle cylinder; the second group of lining warp yarns 11 are unwound from the lining warp yarn creel, pass through the yarn guide holes on the second group of lining warp yarn guide discs 1-8 and are padded into the knitting area along the gap between the two knitting needles 2-3 of the dial. The angle at which each set of yarns is laid down into the knitting mechanism is determined by the angle of the yarn and theThe included angle of the knitting direction is a knitting longitudinal angle beta, the direction of the arrangement of the yarn and the needle of the needle cylinder 2-2 is a knitting transverse angle alpha, the variation range of the knitting longitudinal angle beta and the knitting transverse angle alpha is 0-90 degrees, and then the knitting longitudinal angles of the knitting yarn 8, the rib front plating yarn 9, the rib back plating yarn 10, the first group of weft insertion yarns 13, the second group of weft insertion yarns 14 and the third group of weft insertion yarns 15 are respectively beta1、β2、β3、β4、β5、β6The knitting transverse angles are respectively alpha1、α2、α3、α4、α5、α6(ii) a The first set of weft inserted yarns 13, rib face plating 9 are adjacent to the first set of warp inserted yarns 11 at a weaving transverse angle alpha4<α2Knitting longitudinal angle beta4、β2Parallel to the direction of weaving, approximately 0 °; the third group of weft inserted yarns 15 and the rib back plating yarns 10 are close to the second group of warp inserted yarns 12, and the weaving transverse angle alpha of the third group of weft inserted yarns6、α3Parallel to the direction of the row of needles 2-2, approximately 0 DEG, knitting longitudinal angle beta6<β3(ii) a The first group of weft insertion yarn feeders 1-4 and the third group of weft insertion yarn feeders 1-6 are parallel in position, and the positions of the yarn feeders for plating the front side of the rib 1-2 and plating the back side of the rib 1-3 are parallel; the yarn guide 1-1 of the weaving yarn is positioned between the first group of weft-inserted yarns 1-4 and the rib front plating yarn guide 1-2, and the weaving transverse angle alpha of the weaving yarn 81The weaving transverse angle alpha between the first set of weft inserted yarns 13 and the rib front plating 94、α2Is between, i.e. alpha4<α1<α2Transverse angle of knitting of beta1The knitting longitudinal angle beta between the third set of weft inserted yarns 15 and the rib back plating 106、β3Is between, i.e. beta6<β1<β3(ii) a A second set of weft-inserted yarn guides 1-5 is positioned parallel to the last dial needle 2-1 when a loop is completed and has a knitting transverse angle alpha5Of a size approximating the weaving transverse angle alpha of the first set of weft inserted yarns 134Knitting longitudinal angle beta5Parallel to the direction of weaving, approximately 0 °. Under the action of the transmission mechanism 4, the dial creels 1-9, the dial yarn guide frames 1-12, the middle creels 1-10, the needle cylinder creels 1-11, the fixed shaft sleeves 4-7 along with the dial, the middle fixed shaft sleeves 4-8 and the needle cylinder fixed shaft sleeves 4-The rotation of 9 is synchronously rotated.
A weaving mechanism: the needle cylinder comprises, by weight, 2-1 parts of a dial, 2-2 parts of a needle cylinder, 2-3 parts of dial needles, 2-4 parts of needle cylinder needles, 2-5 parts of dial triangular seats, 2-6 parts of needle cylinder triangular seats, dial cams and needle cylinder cams. Wherein, the dial 2-1 is connected with the dial dead axle 4-3, the needle cylinder 2-2 is connected with the rack table surface 6-3, and the dial 2-1 and the needle cylinder 2-2 are fixed in the knitting process; the dial triangular seats 2-5 are connected with dial fixed shaft sleeves 4-7, the needle cylinder triangular seats 2-6 are connected with needle cylinder fixed shaft sleeves 4-9, and synchronously rotate under the action of the transmission mechanism 4 to drive the dial triangular and the needle cylinder triangular to synchronously rotate, and knitting of the rib back side coils 7-2, the rib back side plating yarns 9, the rib front side coils 7-1 and the rib front side plating yarns 8 is respectively carried out.
A drawing and coiling mechanism: the device comprises a drawing and coiling rack 3-1, a direct current torque motor 3-2, a drawing roller 3-3, a press roller A3-4, a press roller B3-4', a cloth roller 3-5, a speed adjusting button 3-6 and an emergency braking button 3-7. The two ends of the traction roller 3-3, the compression roller A3-4, the compression roller B3-4 'and the cloth roller 3-5 are connected with the traction coiling rack 3-1, the traction roller 3-3 actively rotates under the action of the direct current torque motor 3-2 to drive the compression roller A3-4 and the compression roller B3-4' to passively and reversely rotate, the rotation speed of the traction roller 3-3 is kept synchronous with the weaving speed of the tubular fabric, and the speed adjusting button 3-6 can be used for adjusting the traction coiling speed.
The transmission mechanism is as follows: 4-1 parts of a squirrel-cage three-phase alternating current asynchronous motor, 4-2 parts of a main transmission shaft, 4-3 parts of a dial dead axle, 4-4 parts of a middle dead axle, 4-5 parts of a needle cylinder dead axle, 4-6 parts of a dial gear wheel, 4-7 parts of a dial dead axle sleeve, 4-8 parts of a middle dead axle sleeve, 4-9 parts of a needle cylinder dead axle sleeve, 4-10 parts of a main transmission shaft sleeve, 4-11 parts of a dial belt pulley, 4-12 parts of a middle belt pulley and 4-13 parts of a needle cylinder belt pulley. A main transmission shaft 4-2 is connected with a squirrel-cage three-phase alternating current asynchronous motor 4-1, the upper part, the middle part and the lower part of the main transmission shaft 4-2 are respectively provided with a main transmission shaft sleeve 4-10, a bearing is arranged between a needle dial fixed shaft 4-3 and a needle dial fixed shaft sleeve 4-7, the needle dial fixed shaft sleeve 4-7 is connected with a needle dial big gear 4-6, and a needle dial belt pulley 4-11 is connected with the needle dial fixed shaft sleeve 4-7 and the upper main transmission shaft sleeve 4-10; a bearing is arranged between the middle fixed shaft 4-4 and the middle fixed shaft sleeve 4-8, and the middle belt pulley 4-12 is connected with the middle fixed shaft sleeve 4-8 and the middle main transmission shaft sleeve 4-10; a bearing is arranged between the needle cylinder fixed shaft 4-5 and the needle cylinder fixed shaft sleeve 4-9, and a needle cylinder belt pulley 4-13 is connected with a main transmission shaft sleeve 4-10 under the sum of the needle cylinder fixed shaft sleeve 4-9; the outside diameters and the heights of the dial gear 4-6, the middle fixed shaft sleeve 4-8 and the needle cylinder fixed shaft sleeve 4-9 are the same; 4-11 dial belt pulleys, 4-12 middle belt pulleys and 4-13 needle cylinder belt pulleys are arranged in parallel along the vertical direction; the squirrel-cage three-phase alternating current asynchronous motor 4-1 transmits power to the main transmission shaft 4-2, the main transmission shaft 4-2 rotates to drive the dial fixed shaft sleeve 4-7, the middle fixed shaft sleeve 4-8 and the needle cylinder fixed shaft sleeve 4-9 to synchronously rotate, so that the dial creels 1-9, the dial yarn guide frames 1-12 and the dial triangular seats 2-5 which are fixed on the dial fixed shaft sleeve 4-7, the middle creels 1-10 fixed on the middle fixed shaft sleeve 4-8, the needle cylinder creels 1-11 and the needle cylinder triangular seats 2-6 which are fixed on the needle cylinder fixed shaft sleeve 4-9 synchronously rotate.
A control mechanism: 5-1 of an electric appliance control box, 5-2 of an operation panel, 5-3 of a circular knitting machine starting button, 5-4 of a circular knitting machine stopping button and 5-5 of a circular knitting machine running speed adjusting button. An operation panel 5-2, a circular knitting machine start button 13-3, a circular knitting machine stop button 5-4 and a circular knitting machine running speed adjusting button 5-5 are arranged on an electric appliance control box 5-1. In the weaving process of the fabric, the stable operation of the machine is ensured through the coordination of the operation panel 5-2, the circular weft knitting machine starting button 5-3, the circular weft knitting machine stopping button 5-4 and the circular weft knitting machine operation speed adjusting button 5-5.
A frame: 6-1 of a circular knitting machine top cover, 6-2 of a circular knitting machine support column, 6-3 of a circular knitting machine rack table surface and 6-4 of a dial fixed shaft support frame. A top cover 6-1 of the circular knitting machine is arranged above the support column 6-2, and a dial gear 4-6, a fixed dial fixed shaft sleeve 4-7 and a dial gear 4-6 are arranged above the top cover; the dial dead axle support frame 6-4 is positioned above the dial big gear 4-6 and used for fixing the dial dead axle 4-3; the rack table 6-3 is arranged below the syringe belt pulley 4-13 and connected with the support column 6-2 to fix the syringe 2-3 and the syringe fixed shaft 4-5.
Because the padding angle and space of the upper lining warp yarns, the lower lining weft yarns and the plating yarns of the circular weft knitting machine are limited, a special type of yarn guide nozzle can be adopted to ensure the accurate padding of the yarns;
the second set of lining warp threads is inserted from the space between the two needles of the dial, with the difficulty that: the position between the needle dial triangular seat and the needle dial is small, the needle dial triangular seat rotates in the knitting process, and the position of the lining warp yarn is fixed, so the size of the lining warp yarn disc and the angle of the lining warp yarn need to be adjusted to a certain extent;
the third group of weft in-laid yarns and the yarns plated on the reverse side of the rib are fed from the dial, and because the yarn lining position is small, if the position is not accurately adjusted, the third group of weft in-laid yarns and the yarns plated on the reverse side of the rib are easily padded into a needle hook to form a plating structure, or the weft in-laid yarns and the plating yarns cannot be padded into the needle hook to form weft in-laid yarns, or the plating yarns are separated from a weaving mechanism and are wound into a dial triangle;
the second group of weft insertion yarns are inserted after the rib plating stitch knitting is finished, namely the first group of warp insertion yarns, the second group of warp insertion yarns, the first group of weft insertion yarns and the third group of weft insertion yarns are inserted into the fabric, the knitting yarns and the plating yarns are inserted into the needle hooks, and the knitting needles move downwards and inwards; the difficulty lies in that: the angle of the yarn is wrongly arranged, so that the second group of weft insertion yarns and the rib knitting yarns are easily inserted into the needle hook during the next cycle knitting.
In the invention, the plating on the front side of the rib and the first group of weft insertion yarns can be stably inserted through position adjustment; the increase of the thickness of the fabric can be realized by increasing the number of the yarns; by plating, the stability of the binding system is increased; the mechanical property of the fabric can be improved by increasing the number of the warp and weft insertion.
Example 2
A method of knitting a weft-knitted multi-layer warp-inserted weft-inserted tubular fabric using the circular knitting machine described in example 1, as shown in fig. 9, comprising the steps of:
(1) starting position: the dial 2-1 and the needle cylinder 2-2 just finish the knitting process of the previous cycle, and the dial knitting needles 2-3 and the needle cylinder knitting needles 2-4 are respectively positioned at the innermost and lowest positions;
(2) ring withdrawing: the dial cam seats 2-5 and the needle cylinder cam seats 2-6 synchronously rotate to drive the dial cam and the needle cylinder cam to synchronously rotate, the dial knitting needles 2-3 and the needle cylinder knitting needles 2-4 respectively move to the outermost and highest positions from the initial positions under the action of the dial cam and the needle cylinder needle cam, and old loops (old rib loops and plating loops) 7-1 ', 8' and 7-2 ', 9' on the dial knitting needles and the needle cylinder knitting needles retreat to needle rods from needle hooks of the dial knitting needles 2-3 and the needle cylinder knitting needles 2-4 to finish loop retreating;
(3) yarn laying: the dial knitting needles 2-3 and the needle cylinder knitting needles 2-4 gradually move inwards and downwards respectively under the action of a needle pressing triangle; when the plating 8 on the front side of the rib and the plating 7 on the back side of the rib are padded into the 2-4 hooks of the needle cylinder, the needle cylinder 2-4 slightly rises, and at the moment, a part of the rib knitting yarn 7 is loosened and padded into the 2-3 hooks of the dial knitting needle together with the plating 9 on the back side of the rib; as the dial needles 2-3 and the cylinder needles 2-4 continue to move inward and downward, respectively, a first set of weft in-laid yarns 12 are laid down into the knitting zone along the back of the cylinder needles 2-4, and a third set of weft in-laid yarns 14 are laid down into the knitting zone along the back of the dial needles 2-3; a first group of lining warp yarns 10 are padded into a knitting area along a gap between two knitting needles 2 to 4 of a needle cylinder and are blocked in the fabric by a first group of lining weft yarns 12; a second group of lining warp yarns 11 are padded into a knitting area along a gap between two knitting needles 2-3 of the dial, and are blocked in the fabric by a third group of lining weft yarns 14; the second group of weft insertion yarns 13 are inserted between the first group of lining warp yarns 10 and the second group of lining warp yarns 11 along the needle backs of the knitting needles of the dial; the first group of weft inserted yarns 10 are clamped by the first group of weft inserted yarns 12 and the second group of weft inserted yarns 13, and the second group of warp inserted yarns 11 are clamped by the second group of weft inserted yarns 13 and the third group of weft inserted yarns 14;
(4) closing the opening: the dial needle 2-3 and the cylinder needle 2-4 continue to move inwards and downwards respectively, and the old loops 7-1 ', 8' and 7-2 ', 9' close the latch of the dial needle 2-3 and the cylinder needle 2-4;
(5) looping, yarn bending, looping and drawing: the dial knitting needle 2-3 and the needle cylinder knitting needle 2-4 are respectively moved to the innermost position and the lowest position, loop looping, yarn bending and loop releasing are sequentially completed, new loops (new rib loops and plating loops) 7-1, 8, 7-2 and 9 are formed, and finally, a weft-knitted multilayer warp-inserted weft-inserted tubular fabric is formed under the action of the drawing mechanism 3;
(6) repeated and cyclic knitting: when one cycle of knitting is finished, all mechanisms of the circular knitting machine return to the initial positions, a new cycle is started, and the knitting actions of (1) to (5) are repeated.
Example 3
A weft-knitted multilayer warp-inserted weft-inserted tubular fabric produced by the method of example 2, as shown in fig. 8 to 11:
the weft-knitted multilayer warp-lining weft-inserting tubular fabric structure is characterized in that a binding system is a 1+1 rib structure and comprises rib front side coils 7-1 and rib back side coils 7-2, and the rib front side coils 7-1 and the rib back side coils 7-2 are connected through adjacent rib coil sinker loops 7-7 of each coil transverse row. The rib front plating 8 is lined in front of the rib front side coil 7-1, the rib front plating 8 is displayed on the front side of the fabric, and the rib front plating sinker loops 8-3 are connected with two adjacent rib front side coils 7-1; the rib back plating 9 is lined behind the rib back loops 7-2, the rib back plating 9 is displayed on the back of the fabric, and the rib back plating sinker loops 9-3 are connected with the two adjacent rib back loops 7-2. A first group of lining warp yarns 10 are lined between two adjacent rib front side coil loop columns 7-3, a second group of lining warp yarns 11 are lined between two adjacent rib back side coil loop columns 7-4, and two adjacent rib coil sinker loops 7-7 are intersected to form an 'N' shape, so that the first group of lining warp yarns 10 and the second group of lining warp yarns 11 are respectively lined in 'N' -shaped hole spaces formed by two adjacent rib coil sinker loops 7-7. In each course, three sets of weft inserted simultaneously, wherein a first set of weft inserted yarns 12 is inserted between the rib front side stitches 7-1 and the first set of weft inserted yarns 10, a second set of weft inserted yarns 13 is inserted between the first set of weft inserted yarns 10 and the second set of weft inserted yarns 11, and a third set of weft inserted yarns 14 is inserted between the second set of weft inserted yarns 11 and the rib back side stitches 7-2. The first set of weft inserted yarns 12, the second set of weft inserted yarns 13 and the third set of weft inserted yarns 14 are all positioned above the sinker loops 7-7 of the rib stitch. In the weft-knitted multilayer warp-inserted weft-inserted tubular fabric, a first group of weft insertion yarns 12, a second group of weft insertion yarns 13 and a third group of weft insertion yarns 14 are arranged in parallel along the circumferential direction of the tubular fabric in a spiral shape; the first set of lining warp yarns 10 and the second set of lining warp yarns 11 are aligned in parallel and straight in the axial direction of the tubular fabric.
When the rib weaving yarns, the rib front plating yarns, the rib back plating yarns, the first group of weft insertion yarns and the first group of warp insertion yarns adopt 450D terylene to weave on a weft-knitted warp-insertion weft-insertion circular weft knitting machine with the number of E9.5, the prepared weft-knitted warp-insertion weft-insertion tubular fabric is discharged from the machine and stands for 24 hours at room temperature, and then the fabric thickness, the warp and weft density and the tensile strength are tested according to the standards GB/T7689.1-2013, GB/T7689.2-2013 and GB/T3923.1-2013.
The test result shows that: the weft-knitted warp-inserted weft-inserted tubular fabric without rib front plating and rib back plating is crossed, after the weft-knitted warp-inserted weft-inserted tubular fabric with rib front plating and rib back plating is removed from the loom, the fabric structure is more stable, namely after the woven fabric is shrunk, the phenomenon that the warp inserting yarns and the weft inserting yarns are exposed is reduced, and the integral flatness and stability of the fabric are improved; ② the thickness of the fabric: after the tubular fabric is unfolded, the thickness of the weft-knitted warp-backed weft insertion fabric without the rib front plating and the rib back plating is 1.18mm, and the thickness of the weft-knitted warp-backed weft insertion fabric with the rib front plating and the rib back plating is 1.79 mm; thirdly, the warp and weft density of the fabric: the weft-knitted warp-lined weft insertion fabric without rib front plating and rib back plating has 35/5 cm warp-lined warp yarns and 34/5 cm weft-lined weft yarns, and after the rib front plating and the rib back plating are added, the overall stability of the fabric is increased, after the fabric is off-machine, the shrinkage phenomenon of the fabric is reduced, namely the deformation along the circumferential direction and the axial direction of the weft-knitted warp-lined weft insertion tubular fabric is reduced, the number of the warp-lined warp yarns is 32/5 cm, and the number of the weft-lined weft yarns is 36/5 cm; fabric tensile strength: the yarn strength is based on the strength of the fabric when the lining warp yarns and the lining weft yarns break, the strength of the 450D terylene when the terylene is stretched and broken is 14.5N, the weft-knitted lining warp and lining weft fabric without the addition of the rib front plating and the rib back plating is characterized by warp strength 486.24N, weft strength 471.54N, yarn strength contribution rate, warp strength 93.57 percent and weft strength 95.69 percent, the warp strength 472.24N of the weft-knitted lining warp and lining weft fabric with the addition of the rib front plating and the rib back plating and the weft strength 503.73N; yarn strength contribution rate, 95.31% in the warp direction and 96.50% in the weft direction; compared with weft-knitted warp-inserted weft-inserted fabrics without rib front plating and rib back plating, the thickness, structural stability and flatness of the weft-knitted warp-inserted weft-inserted fabrics with rib front plating and rib back plating are increased; compared with the weft-knitted warp-inserted weft-inserted plated tubular fabric with one layer of warp inserting yarns and one layer of weft inserting yarns, the number of the warp inserting and weft inserting yarns of the weft-knitted multi-layer warp inserting and weft inserting plated tubular fabric is increased, so that the thickness, the stability and the mechanical property of the fabric are correspondingly increased.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. A circular weft knitting machine for weft-knitted multi-layer warp-inserting and weft-inserting tubular fabrics is characterized by comprising a yarn feeding mechanism, a knitting mechanism, a traction coiling mechanism, a transmission mechanism, a control mechanism, a rack and an auxiliary device; the yarn feeding mechanism comprises a rib weaving yarn, a rib front plating yarn, a rib back plating yarn, a first group of weft in-laid yarns, a second group of weft in-laid yarns, a third group of weft in-laid yarn guides and a creel, wherein the first group of warp in-laid yarn guide discs, the second group of warp in-laid yarn guide discs and the warp in-laid creel; the transmission mechanism comprises a main transmission shaft, a dial dead axle, a middle dead axle, a needle cylinder dead axle, a dial gearwheel, a dial dead axle shaft sleeve, a middle dead axle shaft sleeve, a needle cylinder dead axle shaft sleeve, a main transmission shaft sleeve, a dial belt pulley, a middle belt pulley and a needle cylinder belt pulley;
the yarn guide nozzles of a first group of weft-inserted yarn guides and rib front plating yarn guides in the yarn feeding mechanism are close to the needle cylinder, are parallel to the height of the needle cylinder, and are sequentially arranged on a needle cylinder creel along the knitting direction; the yarn guide nozzles of the knitting yarn guide and the second group of weft insertion yarn guide are close to the position between the dial and the needle cylinder and are sequentially arranged on the middle creel along the knitting direction; the third group of weft-inserted yarn feeders and the yarn guide nozzles of the rib reverse plating yarn feeders are close to the dial, are parallel to the lower bottom surface of the dial and are sequentially arranged on the dial creel along the knitting direction; the dial creel, the middle creel and the needle cylinder creel are respectively connected with the dial fixed shaft sleeve, the middle fixed shaft sleeve and the needle cylinder fixed shaft sleeve; the first group of lining warp yarn guide discs and the second group of lining warp yarn guide discs are respectively connected with support columns of the circular weft knitting machine, and yarn guide holes are uniformly distributed on the first group of lining warp yarn guide discs and the second group of lining warp yarn guide discs; the yarn guide holes of the first group of lining warp yarn guide discs are parallel to the needle cylinder, and the yarn guide holes of the second group of lining warp yarn guide discs are parallel to the periphery of the needle disc;
the yarn feeding mechanism conveys the yarn unwound from the yarn cylinder to a knitting area, and particularly, a first group of warp lining yarns penetrate through yarn guide holes in a first group of warp lining yarn guide discs and are padded into the knitting area along a gap between two knitting needles of the needle cylinder; the yarn guide holes of the second group of warp lining yarn guide discs are parallel to the periphery of the dial, and the second group of warp lining yarns unwound from the yarn barrel of the warp lining yarn frame pass through the yarn guide holes on the second group of warp lining yarn guide discs and are padded into a knitting area along a gap between two knitting needles of the dial; a third group of weft inserted yarns and rib reverse plating yarns positioned on a dial creel are unwound from the yarn cylinder and are padded into a weaving area through yarn guide holes of respective yarn guides; the weaving yarns and the second group of weft in-laid yarns positioned on the middle creel are unwound from the yarn barrel and are padded into the weaving area through the yarn guide holes of the respective yarn guides; a first group of weft-inserted yarns and rib front plating yarns positioned on a needle cylinder yarn stand are unwound from a yarn cylinder and are padded into a knitting area through yarn guide holes of respective yarn guides; the dial creel, the dial yarn guide frame, the middle creel and the needle cylinder creel which are connected with the fixed shaft sleeve synchronously rotate along the knitting direction along with the rotation of the triangular seats of the dial and the needle cylinder under the driving of respective belt pulleys; the spacing between the third group of weft-in threads and the plated back side of the rib threads is reduced due to the lining of the second group of warp-in threads, the spacing is a gap between the second group of warp-in threads and a dial, and the third group of weft-in threads and the plated back side of the rib threads are lined in the fabric by adopting a special type of yarn guide or a yarn guide needle through adjusting the yarn laying angle; simultaneously, in order that each group of yarns can accurately enter the fabric, the yarn guide of each group of yarns combines the adjustment of the yarn laying angle to accurately enter the fabric with the yarns.
2. The circular knitting machine according to claim 1, wherein the angle at which each set of yarns in the yarn feeding mechanism is inserted into the knitting mechanism is set such that the angle between the yarn and the knitting direction is set as a knitting longitudinal angle β, the direction in which the yarn and the cylinder needle are arranged is set as a knitting traverse angle α, and the knitting longitudinal angle β and the knitting traverse angle α are varied within a range of 0 ° to 90 °, and the knitting longitudinal angles of the knitting yarn, the rib face plating, the rib back plating, the first set of weft in-laid yarns, the second set of weft in-laid yarns, and the third set of weft in-laid yarns are set as β1、β2、β3、β4、β5、β6The knitting transverse angles are respectively alpha1、α2、α3、α4、α5、α6(ii) a The first set of weft inserted yarns, rib front plating proximate to the first set of warp inserted yarns, having a weaving draft angle alpha4<α2Knitting longitudinal angle beta4、β2Parallel to the direction of weaving, approximately 0 °; the third group of weft insertion yarns and rib back plating yarns are close to the second group of warp insertion yarns, and the weaving transverse angle alpha of the third group of weft insertion yarns and the rib back plating yarns is6、α3Parallel to the arrangement direction of the cylinder needles, approximately 0 DEG, and a knitting longitudinal angle beta6<β3(ii) a The first group of weft-inserted yarn guides and the third group of weft-inserted yarn guides are parallel in position, and the positions of the yarn guides plated on the front side of the rib and plated on the back side of the rib are parallel; the yarn carrier of the weaving yarn is positioned between the first group of weft-inserted yarns and the rib front plating yarn carrier, and the weaving transverse angle alpha of the weaving yarn1Knitting transverse angle alpha between first set of weft insertion yarns and rib front plating4、α2Is between, i.e. alpha4<α1<α2Transverse angle of knitting of beta1Knitting longitudinal angle beta between third group of weft inserted yarns and rib reverse plating6、β3Is between, i.e. beta6<β1<β3(ii) a The second group of weft-inserted yarn guides is arranged at a position parallel to the last dial needle when a loop is completed and having a knitting transverse angle alpha5Having a size similar to the weaving transverse angle alpha of the first set of weft inserted yarns4Knitting longitudinal angle beta5Parallel to the weaving direction, approximately 0 °.
3. The circular knitting machine according to claim 1 wherein the knitting mechanism is a knitting mechanism for knitting the yarn laid in the knitting area into a tubular knitted fabric by operation of a knitting mechanism including a dial, a cylinder, dial needles, cylinder needles, dial cams, cylinder cams, dial cams, and dial cams, the dial cams being connected to the dial cams by screws, the dial cams being connected to the dial cams by screw-dial dead axle sleeves; the needle cylinder triangle is connected with the needle cylinder triangle seat through a screw, and the needle cylinder triangle seat is connected with the needle cylinder fixed shaft sleeve through a screw.
4. The circular knitting machine according to claim 1, wherein the dial needles in the knitting mechanism knit rib-side stitches and rib-side plated stitches while inserting the inserted third set of weft in-laid yarns, the second set of warp in-laid yarns, and the second set of weft in-laid yarns into the fabric in accordance with rotation of dial cams; the needle cylinder knitting needle weaves rib front side coils and rib front side plated coils along with the rotation of the needle cylinder triangle, and simultaneously, a first group of padded weft insertion yarns and a first group of padded warp insertion yarns are inserted into the fabric; the dial cam and the needle cylinder cam synchronously rotate along the knitting direction under the action of the transmission mechanism, and are cooperated with each mechanism to knit the weft-knitted multi-layer warp-inserted weft-inserted tubular fabric.
5. A method for weaving a weft-knitted multi-layer warp-inserted weft-inserted tubular fabric by using the circular weft knitting machine as claimed in any one of claims 1 to 4, wherein the order of yarn padding into a weaving area in the weaving process is rib knitting yarn, rib front plating yarn, a first group of weft insertion yarns, a first group of warp insertion yarns, rib back plating yarn, a third group of weft insertion yarns, a second group of warp insertion yarns and a second group of weft insertion yarns.
6. The method of claim 5, comprising the steps of:
(1) ring withdrawing: the dial cam and the needle cylinder cam synchronously rotate, the dial knitting needle and the needle cylinder knitting needle respectively move to the outermost position and the highest position from the initial position under the action of the needle lifting cam, and old rib loops and plated loops on the dial knitting needle and the needle cylinder knitting needle are withdrawn from a hook to a needle rod to finish loop withdrawal;
(2) yarn laying: the dial knitting needle and the needle cylinder knitting needle gradually move inwards and downwards under the action of the needle pressing triangle respectively; plating on the front side of the rib, padding the rib knitting yarns into a needle hook of a needle cylinder, slightly lifting the needle cylinder, releasing a part of rib knitting yarns at the moment, padding the rib knitting yarns into a needle hook of a dial knitting needle together with plating on the back side of the rib, and continuously moving the dial knitting needle and the needle cylinder knitting needle inwards and downwards respectively; the first group of weft insertion yarns are padded into the knitting area along the needle back of the needle cylinder knitting needle, and the third group of weft insertion yarns are padded into the knitting area along the needle back of the needle dial knitting needle; the first group of lining warp yarns are padded into a knitting area along a gap between two knitting needles of the needle cylinder and are blocked in the fabric by the first group of lining weft yarns; the second group of weft in-laid yarns are padded into a knitting area along a gap between two knitting needles of the dial and are blocked in the fabric by the third group of weft in-laid yarns; the second group of weft insertion yarns are padded between the first group of lining warp yarns and the second group of lining warp yarns along the needle backs of the knitting needles of the dial; the first group of weft-inserted yarns are clamped by the first group of weft-inserted yarns and the second group of weft-inserted yarns, and the second group of warp-inserted yarns are clamped by the second group of weft-inserted yarns and the third group of weft-inserted yarns;
(3) closing the opening: the dial knitting needles and the cylinder knitting needles continuously move inwards and downwards respectively, and the old coils close the latch of the dial knitting needles and the cylinder knitting needles;
(4) looping, yarn bending, looping and drawing: the dial knitting needle and the needle cylinder knitting needle are respectively moved to the innermost position of the dial and the lowest position of the needle cylinder, loop looping, yarn bending and loop releasing are sequentially completed, new rib stitch and plating stitch are formed, and a weft-knitted multi-layer warp-inserting and weft-inserting tubular fabric is formed under the action of a drawing mechanism.
7. A weft knitted multi layer warp inserted weft inserted tubular fabric knitted according to the method of claim 5 or 6.
8. The weft-knitted multilayer warp-inserted weft-inserted tubular fabric according to claim 7, wherein the weft-knitted multilayer warp-inserted weft-inserted tubular fabric is a binding system with 1+1 rib, and the weft-knitted multilayer warp-inserted weft-inserted tubular fabric has 8 systems of yarns, namely rib knitting yarns, rib face plating yarns, rib back plating yarns, a first set of lining warp yarns, a second set of lining warp yarns, a first set of lining weft yarns, a second set of lining weft yarns and a third set of lining weft yarns, wherein the lining warp yarns and the lining weft yarns do not participate in knitting, are inserted into the rib plating texture in a parallel and straight manner, and simultaneously, three sets of lining weft yarns are inserted above a sinker loop of each rib stitch and are clamped by loop columns of the rib face stitch and the rib back stitch.
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CN113818132B (en) * 2021-10-25 2022-06-07 江南大学 Expanding, shaping and drawing device for warp-inserting and weft-inserting circular weft knitting machine
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