Single-sided double-needle-bar weft knitting fabric with warp and weft insertion, knitting method and circular knitting machine

Abstract

The present application relates to a single-sided double-needle weft-knitted tubular fabric with warp and weft inserts, a weaving method, and a circular knitting machine, and relates to the field of textiles. The tubular fabric has the following yarn sequence from the front to the back of the fabric: second binding coil, second weft insert, warp insert, first binding coil, first weft insert, and warp insert; the warp insert is located between the sinker arc of the first binding coil and the first weft insert, and between the sinker arc of the second binding coil and the second weft insert, and there is a warp insert between the first front coil and the second front coil; the first weft insert is located behind the coil post of the first binding coil, above the sinker arc of the first binding coil, and in front of the warp insert; the second weft insert is located behind the coil post of the second binding coil, above the sinker arc of the second binding coil, and in front of the warp insert. The fabric has the effect of a double-layer fabric, and the weft insert is evenly and tightly arranged along the circumferential direction of the fabric.

Description

Technical Field

[0001] The present application relates to the field of textile technology, and in particular to a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay, a weaving method and a circular knitting machine. Background Art

[0002] One-piece tubular composites offer excellent structural integrity, stability, and resistance to delamination, avoiding the structural defects and reduced mechanical properties often associated with fabric layups or wet-wound tubular composites. These tubular composites can be used in aerospace, transportation, fluid transfer, and FRP-confined concrete. With increasing industrial demand for lightweight, high-strength tubular composites, the design, development, engineering, and scale-up of one-piece tubular reinforcements have garnered significant attention from universities and businesses.

[0003] The structure of tubular reinforcement is one of the important factors affecting the mechanical properties of tubular composite materials. Existing one-piece tubular reinforcements can be prepared by four methods: braiding, weaving, knitting, and non-woven. Among them, knitted tubular fabrics can be prepared by circular knitting machines, flat knitting machines, and warp knitting machines, and preforms of different shapes such as straight, U-shaped, T-shaped, Y-shaped, and X-shaped can be prepared. The interpenetrating coil structure gives this type of tubular fabric good conformability, but it is difficult to meet the industry's requirements for high-strength, high-modulus, and low-elongation tubular reinforcements. Compared with traditional tubular knitted fabrics, weft-knitted biaxial tubular (WKBT) fabrics use weft plain needles, ribs, etc. as binding systems, and high-performance yarns are lined along the axial and circumferential directions of the fabric to enhance the mechanical properties of the fabric.

[0004] Compared to woven tubular fabrics and braided tubular fabrics, weft-knitted tubular fabrics with warp and weft lining have the advantages of high yarn strength utilization, excellent fabric integrity and structural stability. Single-sided circular knitting machines with warp and weft lining have the advantages of low material loss, strong weaving stability, and high production efficiency. They are currently one of the most cost-effective methods for preparing tubular reinforcements. When the density of the weft lining yarn is much greater than that of the warp lining yarn, the bending stiffness of the weft lining yarn is much greater than that of the warp lining yarn. At this time, wrinkles and arching of the lining yarn appear on the fabric surface, seriously affecting the appearance and performance of such fabrics. Therefore, designing a weft-knitted tubular fabric with uniform and dense weft lining has become a current problem that needs to be solved. Summary of the Invention

[0005] The purpose of this application is to provide a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay, a weaving method and a circular knitting machine to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above objectives, the technical solutions adopted in this application are:

[0007] In a first aspect, the present application provides a single-sided double-needle-track warp and weft inserting circular knitting machine, comprising:

[0008] A frame having a circular knitting machine top cover mounted on the top of a plurality of circular knitting machine support columns, a circular knitting machine frame table mounted in the middle of the plurality of circular knitting machine support columns, and a fixed axis support frame mounted on the circular knitting machine top cover;

[0009] a yarn feeding mechanism, which is located between the top cover of the circular knitting machine and the frame table of the circular knitting machine, and comprises a weft yarn guide disc, a weft yarn yoke and a weft yarn guide distributed on the weft yarn guide disc, a warp yarn guide disc frame connected to the top cover of the circular knitting machine at one end, a binding yarn yoke and a binding yarn guide frame arranged from top to bottom on the inner side of the warp yarn guide disc frame, and the binding yarn guide frame is connected to the binding yarn guide;

[0010] a weaving mechanism located between the top cover of the circular knitting machine and the frame table of the circular knitting machine, comprising an oblique needle cylinder mounted on the frame table of the circular knitting machine, a needle groove located on the outer peripheral wall of the oblique needle cylinder, a triangular seat located on the outer periphery of the oblique needle cylinder and mounted on the inlay weft yarn guide disc, and a triangular seat gear mounted on the bottom of the inlay weft yarn guide disc, a knitting needle in the needle groove, and a needle cylinder cam on the inner side of the triangular seat;

[0011] a transmission mechanism for driving the yarn feeding mechanism and the weaving mechanism to work, comprising a slave transmission shaft located above the circular knitting machine frame table and a slave transmission shaft gear located between the circular knitting machine top cover and the fixed axis support frame, the slave transmission shaft gear being sleeved on one end of the slave transmission shaft close to the fixed axis support frame, the binding yarn frame and the binding yarn guide frame being mounted on the slave transmission shaft from top to bottom; and

[0012] An expansion and sizing mechanism is located below the frame table of the circular knitting machine, and a pulling and winding mechanism is located below the expansion and sizing mechanism.

[0013] In a possible implementation, the expansion and sizing mechanism includes:

[0014] The first end is connected to the fixed axis support frame, and the second end extends to the expansion, sizing and fixed axis below the frame table of the circular knitting machine;

[0015] A frustoconical expansion device installed on the second end of the expansion, sizing and axis determination device;

[0016] An internal expansion frame installed at the bottom of the frustum-type expansion device; and

[0017] External pressure frames installed on the circular knitting machine support column and located on both sides of the frustum-type expansion device;

[0018] Wherein, the slave transmission shaft is rotatably sleeved on the outer side of the expansion, diameter and axis fixing device through multiple sets of bearings.

[0019] In a possible implementation, the top of the frustum-type expansion device is connected to the expansion, sizing and axis determination device via a frustum-top support frame, and the bottom of the frustum-type expansion device is connected to the expansion, sizing and axis determination device via a frustum-bottom support frame.

[0020] In a possible implementation, the internal expansion rack includes:

[0021] a telescopic rod located below the frustum-shaped expansion device; and

[0022] A connecting rod with a first end connected to the support frame under the truncated table and a second end connected to the telescopic rod;

[0023] In which, a group of expanding rods are provided on both sides of the bottom of the frustum-type expanding device, the first end of the expanding rods of the first group is connected to the bottom of the frustum-type expanding device, and the second end of the expanding rods of the first group is connected to the first end of the telescopic rod; the first end of the expanding rods of the second group is connected to the bottom of the frustum-type expanding device, and the second end of the expanding rods of the second group is connected to the second end of the telescopic rod.

[0024] In one possible implementation, the external pressure frame includes:

[0025] A connecting frame mounted on the support column of the circular knitting machine;

[0026] a fixing rod having a first end connected to the connecting frame;

[0027] A connecting seat having a top connected to the second end of the fixing rod; and

[0028] A pressure rod with a first end connected to the side wall of the connecting seat, and a second end of the pressure rod close to the bottom of the frustum-shaped expansion device.

[0029] In a possible implementation, the pulling and winding mechanism includes:

[0030] A pulling and winding frame mounted on the circular knitting machine support column;

[0031] A pulling roller, a first pressing roller, and a second pressing roller rotatably connected to the pulling and winding frame, wherein the first pressing roller and the second pressing roller are located below the pulling roller and are in a triangular shape, for winding the tubular fabric;

[0032] A DC torque motor installed on the pulling and winding frame and transmission-connected to the pulling roller;

[0033] a cloth winding roller mounted on the pulling and winding frame and located below the first pressing roller; and

[0034] A speed adjustment button and an emergency stop button are installed on the pulling and winding frame and electrically connected to the DC torque motor.

[0035] In a possible implementation, the weaving mechanism further includes:

[0036] A four-wire ball wire raceway is provided between the outer side of the oblique needle cylinder and the inner side of the triangular seat gear;

[0037] Balls arranged in the four-wire ball wire runway; and

[0038] A triangle adjuster mounted on the outer wall of the triangle seat;

[0039] Wherein, the triangular seat is fixed on the weft yarn guide disc by means of a limiting bolt and a positioning screw.

[0040] In a possible implementation, the transmission mechanism further includes:

[0041] A motor support frame installed on the pulling and winding frame;

[0042] A three-phase AC asynchronous motor mounted on the motor support frame, wherein the three-phase AC asynchronous motor has a motor transmission shaft, and a motor transmission shaft sleeve is sleeved on the motor transmission shaft; and

[0043] A main transmission shaft vertically passes through the circular knitting machine top cover and the circular knitting machine frame table in sequence and then extends to the bottom of the circular knitting machine frame table, and a main transmission shaft sleeve is provided on the main transmission shaft;

[0044] Among them, the top sleeve of the main transmission shaft is provided with a main transmission shaft upper sleeve, the middle sleeve of the main transmission shaft is provided with a main transmission shaft middle sleeve, the bottom sleeve of the main transmission shaft is provided with a main transmission shaft lower sleeve, the motor transmission shaft sleeve is connected to the main transmission shaft lower sleeve through a motor transmission belt, the main transmission shaft middle sleeve is connected to the outer side of the triangular seat gear through a triangular seat belt, and the main transmission shaft upper sleeve is connected to the slave transmission shaft gear through a slave transmission shaft belt.

[0045] In a possible implementation, the method further includes:

[0046] A control mechanism electrically connected to the yarn feeding mechanism, the weaving mechanism, the width expanding and sizing mechanism, the pulling and winding mechanism, and the transmission mechanism, for controlling the coordinated operation of the various mechanisms;

[0047] The control mechanism includes an electrical control box installed on the frame, and the electrical control box is provided with an operation panel, a circular knitting machine inching button, a circular knitting machine running button and a circular knitting machine stop button.

[0048] In a second aspect, the present application provides a single-sided double-needle track weft-knitted tubular fabric with warp and weft inlay, which is woven by the single-sided double-needle track warp and weft inlay circular knitting machine as described above;

[0049] The single-sided double-needle weft-knitted tubular fabric with warp and weft inlay uses a variable weft plain needle as a binding system and is composed of five systems of yarns: a first binding loop, a second binding loop, a first inlay weft yarn, a second inlay weft yarn, and an inlay warp yarn. The first inlay weft yarn, the second inlay weft yarn, and the inlay warp yarn do not participate in the loop-forming knitting.

[0050] From the front side of the fabric to the back side of the fabric, the order of the yarns is the second binding loop, the second weft yarn, the warp yarn, the first binding loop, the first weft yarn and the warp yarn.

[0051] The inlay warp yarn is located between the sinker loop of the first binding coil and the first inlay weft yarn, and between the sinker loop of the second binding coil and the second inlay weft yarn, and the inlay warp yarn is contained between the two front coils of each coil;

[0052] The first weft inlay yarn is located behind the coil column of the first binding coil and above the sinking arc of the first binding coil, and is blocked in front of the warp inlay yarn;

[0053] The second weft inlay yarn is located behind the coil column of the second binding coil and above the sinking arc of the second binding coil, and is blocked in front of the warp inlay yarn.

[0054] In a third aspect, the present application provides a weaving method for a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay, which is used to weave the single-sided double-needle weft-knitted tubular fabric as described above, the method comprising:

[0055] S1. During the weaving process, the transmission mechanism is activated by the control mechanism, the oblique needle cylinder is fixed, and the cam is driven by the cam belt to rotate synchronously with the binding yarn frame, binding yarn guide, weft yarn frame, and weft yarn guide. The old coil on the knitting needle is withdrawn from the needle hook to the needle bar, completing the withdrawal;

[0056] S2. The first binding coil is padded into the odd-numbered needle hooks, and the lining warp yarn is padded into the weaving area along the gap between the two knitting needle grooves of the oblique needle cylinder. The first lining weft yarn is padded into the weaving area along the back of the knitting needle of the oblique needle cylinder and is blocked by the coil column of the first new coil and blocked in front of the lining warp yarn. Under the action of the pulling and winding mechanism, the first weft-knitted lining warp and weft tubular structure is formed;

[0057] S3. The second binding coil is padded with the even-numbered needle hooks, and the lining warp yarn is padded into the weaving area along the gap between the needle grooves of the two knitting needles of the oblique needle cylinder. The second lining weft yarn is padded into the weaving area along the back of the knitting needle of the oblique needle cylinder and is blocked by the coil column of the second binding coil and blocked in front of the lining warp yarn. Under the action of the pulling and winding mechanism, a second weft-knitted lining warp and weft tubular structure is formed. The first and second weft-knitted lining warp and weft tubular structures form a horizontal row of single-sided double-needle weft-knitted lining warp and weft tubular fabric.

[0058] The beneficial effects of the technical solution provided by this application include at least:

[0059] 1. Compared with the single-side single-needle warp and weft circular knitting machine, the single-side double-needle warp and weft circular knitting machine provided by the present application can be used to prepare not only single-side single-needle weft-knitted warp and weft tubular fabrics and single-side tubular fabrics, but also single-side staggered plain weft-knitted warp and weft tubular fabrics, single-side staggered tuck weft-knitted warp and weft tubular fabrics and added yarn tubular fabrics of these four fabrics. The structure of the tubular fabric is flexible and adaptable. The types and specifications of the warp and weft yarns can be selected from a wide range, including natural fibers, high-functional yarns, high-performance yarns, etc., and the specifications of the yarns can be selected from short fiber yarns, filament yarns, textured yarns, mixed yarns, etc. By adjusting the density and type of the warp and weft yarns, a single-side double-needle weft-knitted warp and weft tubular fabric with a compact and stable structure can be prepared, thereby meeting the needs of different fields for lightweight and high-strength tubular reinforcements.

[0060] 2. Compared with circular looms and braiding machines, the single-sided double-needle warp and weft circular loom provided by this application can minimize the wear of the warp yarns, weft yarns and textile machine parts during the weaving process, so that the prepared tubular fabric has a better yarn strength utilization rate; by adjusting the number and twist of the warp yarns and weft yarns, the separation of the warp yarns and weft yarns during the weaving process is avoided, which is conducive to the smooth progress of weaving.

[0061] 3. Compared with the single-sided single-needle weft-knitted tubular fabric with warp and weft inlay, the single-sided double-needle weft-knitted tubular fabric prepared in this application has two weft yarns in one coil row of the fabric, so that the prepared tubular fabric has the effect of a double-layer fabric, while increasing the mechanical properties of the tubular fabric in the circumferential and radial directions.

[0062] 4. The design of the four-wire ball wire runway in the single-sided double-needle track warp and weft circular knitting machine provided in this application reduces friction, reduces operating load, enables the triangle seat to maintain good and stable motion accuracy for a long time, extends its service life, and is conducive to the smooth, high-speed, low-noise and low-consumption operation of the single-sided double-needle track warp and weft circular knitting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0064] Figure 1 A schematic diagram of the front shaft side structure of a single-sided double-needle-track warp and weft inserting circular knitting machine provided by an exemplary embodiment of the present application is shown;

[0065] Figure 2 A schematic diagram of the rear axle side structure of a single-sided double-needle warp and weft circular knitting machine provided by an exemplary embodiment of the present application is shown;

[0066] Figure 3 A schematic top view of a single-sided double-needle-track warp and weft inserting circular knitting machine provided by an exemplary embodiment of the present application is shown;

[0067] Figure 4 A schematic cross-sectional view of a single-sided double-needle-track warp and weft inserting circular knitting machine provided by an exemplary embodiment of the present application is shown;

[0068] Figure 5 It shows the motion control structure diagram of the weft knitting circular knitting machine with double needle tracks and warp and weft inserting;

[0069] Figure 6 A schematic structural diagram of a single-sided double-needle weft-knitted tubular fabric with warp and weft insertion provided by an exemplary embodiment of the present application is shown;

[0070] Figure 7 A schematic diagram of the front structure of a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay provided by an exemplary embodiment of the present application is shown;

[0071] Figure 8 A schematic diagram of the reverse structure of a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay provided by an exemplary embodiment of the present application is shown;

[0072] Figure 9 The following is a process diagram of a single-sided double-needle weft-knitted tubular fabric with warp and weft insertion provided by an exemplary embodiment of the present application; wherein, (1) is a knitting diagram; (2) is a needle butt arrangement diagram;

[0073] (3) is a triangular configuration diagram, "—" is a floating line, and "∧" is a circle;

[0074] Figure 10 A schematic flow chart of a weaving method for a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay provided by an exemplary embodiment of the present application is shown;

[0075] In the picture:

[0076] 1. Single-sided double-needle weft-knitted tubular fabric with warp and weft inserts; 2. Yarn feeding mechanism; 3. Weaving mechanism; 4. Width expansion and sizing mechanism; 5. Pulling and winding mechanism; 6. Transmission mechanism; 7. Control mechanism; 8. Frame;

[0077] 1-1, first binding coil; 1-2, second binding coil; 1-3, first weft inlay; 1-4, second weft inlay; 1-5, warp inlay;

[0078] 2-1, bundled yarn creel; 2-2, bundled yarn guide; 2-3, bundled yarn guide frame; 2-4, weft creel; 2-5, weft creel guide; 2-6, weft creel guide disc; 2-7, warp creel guide disc frame;

[0079] 3-1, oblique needle cylinder; 3-2, needle groove; 3-3, triangular seat; 3-4, triangular seat gear; 3-5, four-wire ball bearing steel wire runway; 3-6, ball bearing; 3-7, limit bolt; 3-8, positioning screw; 3-9, triangular adjuster;

[0080] 4-1, truncated cone expansion device; 4-2, expansion, diameter, and axis determination; 4-21, upper support frame for the truncated cone; 4-22, lower support frame for the truncated cone; 4-3, internal expansion frame; 4-31, telescopic rod; 4-32, expansion rod; 4-33, connecting rod; 4-4, external pressure frame; 4-41, pressure rod; 4-42, connecting seat; 4-43, fixing rod; 4-44, connecting frame;

[0081] 5-1, pulling roller; 5-2, first pressure roller; 5-21, second pressure roller; 5-3, cloth winding roller; 5-4, DC torque motor; 5-5, pulling and winding frame; 5-6, speed adjustment button; 5-7, emergency stop button;

[0082] 6-1. Three-phase AC asynchronous motor; 6-2. Motor support frame; 6-3. Motor drive shaft; 6-4. Motor drive shaft sleeve; 6-5. Motor drive belt; 6-6. Main drive shaft; 6-7. Slave drive shaft; 6-8. Slave drive shaft gear; 6-9. Main drive shaft sleeve; 6-91. Main drive shaft upper sleeve; 6-92. Main drive shaft middle sleeve; 6-93. Main drive shaft lower sleeve; 6-10. Triangular seat belt; 6-11. Slave drive shaft belt;

[0083] 7-1. Electrical control box; 7-2. Operation panel; 7-3. Circular knitting machine inching button; 7-4. Circular knitting machine run button; 7-5. Circular knitting machine stop button;

[0084] 8-1. Circular knitting machine top cover; 8-2. Circular knitting machine support column; 8-3. Circular knitting machine frame table; 8-4. Fixed axis support frame. DETAILED DESCRIPTION

[0085] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0086] Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings of the present application specification, and the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from specific parts, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application specification, the meaning of "multiple" is two or more.

[0087] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0088] Example 1:

[0089] See also Figures 1 to 5 , Figure 1 A schematic diagram of the front shaft side structure of a single-sided double-needle warp and weft circular knitting machine provided by an exemplary embodiment of the present application is shown. Figure 2 The figure shows a schematic diagram of the rear axle side structure of a single-sided double-needle warp and weft circular knitting machine provided by an exemplary embodiment of the present application. Figure 3 The figure shows a schematic top view of a single-sided double-needle warp and weft circular knitting machine provided by an exemplary embodiment of the present application. Figure 4 The figure shows a cross-sectional structural diagram of a single-sided double-needle warp and weft circular knitting machine provided by an exemplary embodiment of the present application. Figure 5 Motion control structure diagram of weft knitting circular knitting machine with double needle track warp and weft insertion.

[0090] The single-jersey, double-needle track, warp- and weft-inserted circular knitting machine comprises a yarn feeding mechanism 2, a weaving mechanism 3, a width-expanding and sizing mechanism 4, a pulling and winding mechanism 5, a transmission mechanism 6, a control mechanism 7, and a frame 8. The frame 8 comprises a circular knitting machine top cover 8-1 mounted on top of four sets of circular knitting machine support columns 8-2, a circular knitting machine frame table 8-3 mounted in the middle of the four sets of circular knitting machine support columns 8-2, and a fixed axis support frame 8-4 mounted on the circular knitting machine top cover 8-1.

[0091] In detail, the yarn feeding mechanism 2 is located between the circular knitting machine top cover 8-1 and the circular knitting machine frame table 8-3, and it has a weft yarn guide disc 2-6, a weft yarn frame 2-4 and a weft yarn guide 2-5 distributed on the weft yarn guide disc 2-6, a warp yarn guide disc frame 2-7 connected to the circular knitting machine top cover 8-1 at one end, and a binding yarn frame 2-1 and a binding yarn guide frame 2-3 arranged from top to bottom on the inner side of the warp yarn guide disc frame 2-7; wherein, the binding yarn guide frame 2-3 is connected to the binding yarn guide 2-2. The weaving mechanism 3 is located between the top cover 8-1 of the circular knitting machine and the frame table 8-3 of the circular knitting machine. It comprises an oblique needle cylinder 3-1 mounted on the frame table 8-3 of the circular knitting machine, a needle groove 3-2 located on the outer peripheral wall of the oblique needle cylinder 3-1, a triangular seat 3-3 located on the outer periphery of the oblique needle cylinder 3-1 and mounted on the weft yarn guide disc 2-6, a triangular seat gear 3-4 mounted on the bottom of the weft yarn guide disc 2-6, a triangular seat gear 3-4 arranged on the outer side of the oblique needle cylinder 3-1 and the triangular seat gear 3-5. The four-wire ball bearing steel wire runway 3-5 between the inner sides of the angle seat gear 3-4, the balls 3-6 arranged in the four-wire ball bearing steel wire runway 3-5, and the triangle adjuster 3-9 installed on the outer wall of the triangle seat 3-3 are used to adjust the density of the fabric; wherein, there is a knitting needle in the needle groove 3-2, and the inner side of the triangle seat 3-3 has a needle cylinder triangle, and the triangle seat 3-3 is fixed to the weft yarn guide disc 2-6 by a limit bolt 3-7 and a positioning screw 3-8.

[0092] In the embodiment of the present application, the needle cylinder cam is used to control the moving trajectory of the knitting needle.

[0093] In the embodiment of the present application, the yarn guide mouth of the binding yarn guide 2-2 is close to the oblique needle cylinder 3-1, and along the weaving direction of the fabric, the binding yarn guides 2-2 of the first binding coil and the second binding coil are arranged in sequence on the binding yarn guide frame 2-3. The first binding coil and the second binding coil are unwound from the yarn drum of the binding yarn frame 2-1 and pass through the yarn guide holes of the binding yarn guide 2-2 of the first binding coil and the second binding coil respectively to be padded into the weaving area.

[0094] In the embodiment of the present application, the yarn guide mouth of the inlay weft yarn guide 2-5 is close to the oblique needle cylinder 3-1 and parallel to the upper surface of the oblique needle cylinder 3-1. Along the weaving direction of the fabric, the inlay weft yarn creels 2-4 for the first and second inlay weft yarns are arranged in sequence on the inlay weft yarn guide disc 2-6. The inlay weft yarn is unwound from the yarn bobbin of the inlay weft yarn creel 2-4 and passed through the yarn guide holes of the inlay weft yarn guide 2-5 for the first and second inlay weft yarns, respectively, and then placed into the weaving area.

[0095] In the embodiment of the present application, the guide holes on the lining warp yarn guide disc 2-7 are evenly distributed, wherein the diameter of the lining warp yarn guide disc 2-7 is slightly larger than the diameter of the oblique needle cylinder 3-1. The lining warp yarn is unwound from the yarn bobbin of the lining warp yarn guide disc 2-7, passes through the guide holes of the lining warp yarn guide disc 2-7, and is inserted into the weaving area, forming a certain angle with the upper surface of the oblique needle cylinder 3-1.

[0096] It's worth noting that the oblique needle barrel 3-1 is truncated, with a smooth, vertically downward, equal-diameter cylindrical inner wall. The outer wall of the oblique needle barrel 3-1 forms an angle of 5° to 90° with the horizontal. The inner wall of the triangular base 3-3 is inclined and parallel to the outer wall of the oblique needle barrel 3-1. The needle barrel cam inside the triangular base 3-3 is connected to the base 3-3 via screws, and the outer wall of the triangular base 3-3 is L-shaped.

[0097] In some embodiments, the weft inlay guide disc 2-6 is connected to the triangular seat gear 3-4 via screws. The four-wire ball bearing raceway 3-5 comprises four raceways, balls 3-6, and a retainer. The balls 3-6 contact the arcuate surfaces of the four-wire ball bearing raceway 3-5 and are fixed in a cavity in all four directions, maintaining a stable distribution circle.

[0098] Furthermore, the transmission mechanism 6 is used to drive the yarn feeding mechanism 2 and the weaving mechanism 3 to work, and it has a slave transmission shaft 6-7 located above the circular knitting machine frame table 8-3 and a slave transmission shaft gear 6-8 located between the circular knitting machine top cover 8-1 and the fixed axis support frame 8-4. The slave transmission shaft gear 6-8 is sleeved on one end of the slave transmission shaft 6-7 close to the fixed axis support frame 8-4, and the binding yarn frame 2-1 and the binding yarn guide frame 2-3 are installed on the slave transmission shaft 6-7 from top to bottom.

[0099] It can be understood that when the transmission shaft 6-7 and the triangular seat 3-3 are in a rotating state and rotate synchronously along the weaving direction, the binding yarn frame 2-1, the binding yarn guide 2-3, the weft yarn frame 2-4 and the weft yarn guide disk 2-6 rotate synchronously along the weaving direction and continuously and evenly pad the yarn into the weaving area.

[0100] Specifically, the expansion and sizing mechanism 4 is located below the knitting machine frame table 8-3. The expansion and sizing mechanism 4 includes an expansion and sizing axis 4-2, the first end of which is connected to the axis support frame 8-4 and the second end of which extends to the bottom of the knitting machine frame table 8-3; a cone-shaped expansion device 4-1 installed on the second end of the expansion and sizing axis 4-2; an internal expansion frame 4-3 installed at the bottom of the cone-shaped expansion device 4-1; and an external pressure frame 4-4 installed on the knitting machine support column 8-2 and located on both sides of the cone-shaped expansion device 4-1. Among them, the transmission shaft 6-7 is rotatably sleeved on the outside of the expansion and sizing axis 4-2 through multiple sets of bearings. The top of the cone-shaped expansion device 4-1 is connected to the expansion and sizing axis 4-2 through the cone-shaped upper support frame 4-21, and the bottom of the cone-shaped expansion device 4-1 is connected to the expansion and sizing axis 4-2 through the cone-shaped lower support frame 4-22. The internal spreading frame 4-3 includes a telescopic rod 4-31 located below the cone-shaped spreading device 4-1; and a connecting rod 4-33, the first end of which is connected to the cone-shaped lower support frame 4-22 and the second end of which is connected to the telescopic rod 4-31; wherein, a group of spreading rods 4-32 are provided on both sides of the bottom of the cone-shaped spreading device 4-1, the first end of the first group of spreading rods 4-32 is connected to the bottom of the cone-shaped spreading device 4-1, and the second end of the first group of spreading rods 4-32 is connected to the first end of the telescopic rod 4-31; the first end of the second group of spreading rods 4-32 is connected to the bottom of the cone-shaped spreading device 4-1, and the second end of the second group of spreading rods 4-32 is connected to the second end of the telescopic rod 4-31. The external pressure frame 4-4 includes a connecting frame 4-44 installed on the circular knitting machine support column 8-2; a fixing rod 4-43 whose first end is connected to the connecting frame 4-44; a connecting seat 4-42 whose top is connected to the second end of the fixing rod 4-43; and a pressure rod 4-41 whose first end is connected to the side wall of the connecting seat 4-42, and the second end of the pressure rod 4-41 is close to the bottom of the cone-shaped expansion device 4-1.

[0101] In the embodiment of the present application, the cone-shaped expansion device 4-1 consists of two parts: an upper conical part and a lower cylindrical part. The conical part mainly plays a guiding role, and the diameter of the cylindrical part is the same as the diameter of the tubular fabric, and mainly plays the role of expansion.

[0102] In the embodiment of the present application, under the action of the pulling and winding mechanism 5, the prepared tubular fabric is pulled downward along the conical portion of the truncated cone expansion device 4-1 and expanded in the truncated cone portion, at which time the fabric is cylindrical.

[0103] In the embodiment of the present application, the upper support frame 4-21 of the truncated table and the lower support frame 4-22 of the truncated table are both composed of a circular sleeve and four connecting rods.

[0104] In addition, the telescopic rod 4-31 and the pressure rod 4-41 are adjusted according to the actual fabric size to meet the expansion requirements of tubular fabrics made from different yarns. The combination of the internal expansion frame 4-3 and the external pressure frame 4-4 causes the tubular fabric to descend along a square cross-section to form a flat fabric near the pulling roller 5-1 described below.

[0105] In the embodiment of the present application, compared with the expansion device of the traditional single-sided circular knitting machine, the expansion and sizing mechanism 4 in the present application makes the circumferential pulling force of the tubular fabric uniform, thereby reducing the difference in pulling tension on each longitudinal row of the tubular fabric, and at the same time is beneficial to improving the dimensional stability of the fabric, reducing wrinkles on the fabric surface, improving the quality of the fabric, and ensuring normal weaving.

[0106] More specifically, the pulling and winding mechanism 5 is located below the expanding and sizing mechanism 4, and the pulling and winding mechanism 5 includes a pulling and winding frame 5-5 installed on the circular knitting machine support column 8-2; a pulling roller 5-1, a first pressure roller 5-2 and a second pressure roller 5-21 rotatably connected to the pulling and winding frame 5-5, the first pressure roller 5-2 and the second pressure roller 5-21 are located below the pulling roller 5-1, and the pulling roller 5-1, the first pressure roller 5-2 and the second pressure roller 5-21 are triangular and are used for winding tubular fabrics; a DC torque motor 5-4 installed on the pulling and winding frame 5-5 and transmission-connected to the pulling roller 5-1; a cloth winding roller 5-3 installed on the pulling and winding frame 5-5 and located below the first pressure roller 5-2; and a speed adjustment button 5-6 and an emergency stop button 5-7 installed on the pulling and winding frame 5-5 and electrically connected to the DC torque motor 5-4.

[0107] In the present embodiment, the pulling roller 5-1 is actively driven by a DC torque motor 5-4, while the first and second pressure rollers 5-2 and 5-21 are passively rotated by the pulling roller 5-1. The surface speeds of the pulling roller 5-1, the first and second pressure rollers 5-2 and 5-21 are the same. The tubular fabric is pulled by the pulling roller 5-1, the first and second pressure rollers 5-2 and 5-21, and is then wound into a predetermined package on the winding roller 5-3.

[0108] In order to provide power to the various mechanisms of the circular knitting machine, the transmission mechanism 6 in the present application also includes a motor support frame 6-2 installed on the pulling and winding frame 5-5; a three-phase AC asynchronous motor 6-1 installed on the motor support frame 6-2, the three-phase AC asynchronous motor 6-1 has a motor transmission shaft 6-3, and the motor transmission shaft 6-3 is sleeved with a motor transmission shaft sleeve 6-4; and a main transmission shaft 6-6 that vertically passes through the circular knitting machine top cover 8-1 and the circular knitting machine frame table 8-3 in sequence and extends to the bottom of the circular knitting machine frame table 8-3, and the main transmission shaft 6-6 is sleeved with a main transmission shaft sleeve 6-9; wherein, the top of the main transmission shaft 6-6 is sleeved with a main transmission shaft upper sleeve 6-91, and the middle part of the main transmission shaft 6-6 is sleeved with a main transmission shaft middle sleeve 6-

[0109] 92. The bottom sleeve of the main transmission shaft 6-6 is provided with a main transmission shaft lower sleeve 6-93, the motor transmission shaft sleeve 6-4 is connected to the main transmission shaft lower sleeve 6-93 through the motor transmission belt 6-5, the main transmission shaft middle sleeve 6-92 is connected to the outer side of the triangle seat gear 3-4 through the triangle seat belt 6-10, and the main transmission shaft upper sleeve 6-91 is connected to the slave transmission shaft gear 6-8 through the slave transmission shaft belt 6-11.

[0110] In this embodiment of the present application, the outer diameter and height of the secondary transmission shaft gear 6-8 are equal to those of the triangular seat gear 3-4. The three-phase AC asynchronous motor 6-1 transmits power to the main transmission shaft 6-6. Under the action of the triangular seat belt 6-10 and the secondary transmission shaft belt 6-11, the triangular seat gear 3-4 and the secondary transmission shaft 6-7 maintain synchronous rotation.

[0111] As a supplementary explanation, the single-sided double-needle warp and weft knitting machine also includes a control mechanism 7 electrically connected to the yarn feeding mechanism 2, the weaving mechanism 3, the width expansion and sizing mechanism 4, the pulling and winding mechanism 5, and the transmission mechanism 6, for controlling the coordinated operation of each mechanism; the control mechanism 7 includes an electrical control box 7-1 mounted on a machine frame 8, on which are provided an operation panel 7-2, a circular knitting machine inching button 7-3, a circular knitting machine run button 7-4, and a circular knitting machine stop button 7-5. Figure 5 The central control unit built into the operation panel 7-2 can control the inching button, run button, stop button, pulling and winding, triangular position, detection and automatic stop device, etc. to ensure the real-time and stability of the motion control and regulation of the circular knitting machine.

[0112] As a preferred embodiment, the single-sided double-needle path warp and weft inlay circular knitting machine also includes auxiliary mechanisms to ensure the smooth weaving of the tubular fabric and additional mechanisms to improve the fabric surface effect of the weft-knitted warp and weft inlay tubular fabric, specifically including an active yarn feeding module, a detection and automatic stop module, an oiling and dust removal module, etc. The active yarn feeding module is used to reduce the tensile force and friction tension of the bundled yarn, so that the yarn feeding speed and yarn tension are consistent, the coil length of each loop forming system is uniform, the generation of defects is reduced, and it is beneficial to improve the structural clarity and structural stability of the prepared tubular fabric; the detection and automatic stop module includes a missed needle automatic stop module, a bad needle automatic stop module, and a broken yarn automatic stop module. When a defect occurs, the machine is stopped in time to prevent the weaving defect from extending and expanding, while reducing potential machine damage; the oiling and dust removal module includes an automatic oiling module, a dust removal and cleaning module, etc., to prevent excessive wear and corrosion of the needles and needle cylinders, and to clean the weaving wadding in time to improve the quality of the fabric.

[0113] To sum up, on the one hand, compared with the single-sided single-needle warp and weft circular knitting machine, the single-sided double-needle warp and weft circular knitting machine provided by the present application can be used to prepare single-sided single-needle weft-knitted warp and weft tubular fabrics and single-sided tubular fabrics, and can also be used to prepare single-sided weft-knitted warp and weft inlayed tubular fabrics, single-sided double-needle weft-knitted warp and weft inlayed tubular fabrics, single-sided double-needle weft-knitted warp and weft inlayed tubular fabrics, single-sided double-needle weft-knitted warp and weft inlayed tubular fabrics, etc. The organizational structure of the tubular fabric is flexible and adaptable; the types and specifications of the warp and weft yarns can be selected from a wide range, and natural fibers, high-functional yarns, high-performance yarns, etc. can be selected; the specifications of the yarns can be selected from short fiber yarns, filaments, textured yarns, mixed yarns, etc.; by adjusting the density and type of the warp and weft yarns, single-sided double-needle weft knitted warp and weft inlayed tubular fabrics with compact and stable structure can be prepared, thereby meeting the needs of different fields for lightweight and high-strength tubular reinforcements. On the other hand, compared to circular looms and braiding machines, the single-sided double-needle track warp and weft inlay circular knitting machine provided by this application can minimize the wear of the warp and weft inlay yarns and textile machine parts during the weaving process, so that the prepared tubular fabric has a good yarn strength utilization rate; by adjusting the number of strands and twist of the warp and weft inlay yarns, the warp and weft inlay yarns can be avoided from splitting during the weaving process, which is conducive to the smooth progress of weaving. On the other hand, the design of the four-wire ball bearing steel wire runway in the single-sided double-needle track warp and weft inlay circular knitting machine provided by this application reduces friction and lowers the operating load, allowing the triangle seat to maintain good and stable motion accuracy for a long time, extending its service life, and facilitating the smooth, high-speed, low-noise, and low-consumption operation of the single-sided double-needle track warp and weft inlay circular knitting machine.

[0114] Example 2:

[0115] See also Figures 6 to 8 , Figure 6 The schematic diagram of the structure of a single-sided double-needle weft-knitted warp-inserted weft-inserted tubular fabric provided by an exemplary embodiment of the present application is shown. Figure 7The front structural diagram of a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay provided by an exemplary embodiment of the present application is shown. Figure 8 A schematic diagram of the reverse structure of a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay provided by an exemplary embodiment of the present application is shown.

[0116] Specifically, the above-mentioned single-sided double-needle weft-knitted warp-inserted weft tubular fabric 1 is woven by the single-sided double-needle weft-inserted weft circular knitting machine provided in Example 1. The single-sided double-needle weft-knitted warp-inserted weft tubular fabric 1 uses a variable weft plain needle as a binding system, and is composed of five systems of yarns: a first binding coil 1-1, a second binding coil 1-2, a first weft inlay yarn 1-3, a second weft inlay yarn 1-4, and a warp inlay yarn 1-5. The first weft inlay yarn 1-3, the second weft inlay yarn 1-4, and the warp inlay yarn 1-5 do not participate in the loop weaving; from the front side of the fabric to the back side of the fabric, the order of the yarns is the second binding coil 1-2, the second weft inlay yarn 1-4, the warp inlay yarn 1-5, the first binding coil 1 -1, the first inlay weft yarn 1-3 and the inlay warp yarn 1-5; the inlay warp yarn 1-5 is located between the sinking arc of the first binding coil 1-1 and the first inlay weft yarn 1-3, and between the sinking arc of the second binding coil 1-2 and the second inlay weft yarn 1-4, and the inlay warp yarn 1-5 is contained between the two front coils of each route; the first inlay weft yarn 1-3 is located behind the coil column of the first binding coil 1-1, and above the sinking arc of the first binding coil 1-1, and is blocked in front of the inlay warp yarn 1-5; the second inlay weft yarn 1-4 is located behind the coil column of the second binding coil 1-2, and above the sinking arc of the second binding coil 1-2, and is blocked in front of the inlay warp yarn 1-5.

[0117] To sum up, compared with the single-sided single-needle weft-knitted tubular fabric with warp and weft inlay, the single-sided double-needle weft-knitted tubular fabric prepared in this application has two weft yarns in one coil row of the fabric, so that the prepared tubular fabric has the effect of a double-layer fabric, while increasing the mechanical properties of the tubular fabric in the circumferential and radial directions.

[0118] Example 3:

[0119] See also Figure 9 and Figure 10 , Figure 9 The following is a process diagram of a single-sided double-needle weft-knitted tubular fabric provided by an exemplary embodiment of the present application; wherein (1) is a weaving diagram;

[0120] (2) is the needle butt arrangement diagram; (3) is the triangle configuration diagram, "—" is the floating line, and "∧" is the loop. Figure 10 A schematic flow chart of a weaving method for a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay provided by an exemplary embodiment of the present application is shown.

[0121] The weaving method of the single-sided double-needle weft-knitted tubular fabric is used to weave the single-sided double-needle weft-knitted tubular fabric 1 as described in the second embodiment, combined with Figures 1 to 4 From the above, the method includes:

[0122] Step S1. During the weaving process, the transmission mechanism 6 is started by the control mechanism 7, the oblique needle cylinder 3-1 is fixed, and the triangular seat 3-3 is driven by the triangular seat belt 6-10 and rotates synchronously with the binding yarn frame 2-1, the binding yarn guide 2-2, the weft yarn frame 2-4, and the weft yarn guide 2-5. The old coil on the knitting needle is withdrawn from the needle hook to the needle bar, completing the withdrawal of the coil.

[0123] Step S2, the first binding coil 1-1 is padded with the odd-numbered needle hook, the lining warp yarn 1-5 is padded into the weaving area along the gap between the two knitting needle grooves of the oblique needle cylinder 3-1, and the first lining weft yarn 1-3 is padded into the weaving area along the back of the knitting needle of the oblique needle cylinder 3-1, and is blocked by the coil column of the first new coil and blocked in front of the lining warp yarn 1-5. Under the action of the pulling and winding mechanism 5, the first weft-knitted lining warp and weft tubular structure is formed.

[0124] Step S3, the second binding coil 1-2 is padded with the even-numbered needle hook, and the lining warp yarn 1-5 is padded into the weaving area along the gap between the needle grooves 3-2 of the two knitting needles of the oblique needle cylinder 3-1, and the second lining weft yarn 1-4 is padded into the weaving area along the back of the knitting needle of the oblique needle cylinder 3-1, and is blocked by the coil column of the second binding coil 1-2 and blocked in front of the lining warp yarn 1-5. Under the action of the pulling and winding mechanism 5, a second weft-knitted lining warp and weft tubular structure is formed, and the first and second weft-knitted lining warp and weft tubular structures form a horizontal row of single-sided double-needle track weft-knitted lining warp and weft tubular fabric 1.

[0125] In summary, the single-sided double-needle weft-knitted warp-lined and weft-lined tubular fabric prepared by the weaving method of the single-sided double-needle weft-knitted warp-lined and weft-lined tubular fabric of the present application has uniform and compact weft yarns, which solves the technical problems that urgently need to be solved in the existing technology.

[0126] In the embodiments disclosed herein, terms such as "installed," "connected," "connected," and "fixed" should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; and "connected" may refer to a direct connection or an indirect connection via an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments disclosed herein based on specific circumstances.

[0127] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A single-sided double-needle weft-knitted tubular fabric with warp and weft inlay, woven on a single-sided double-needle weft-knitted circular knitting machine, characterized by: The single-sided double-needle warp and weft circular knitting machine includes a yarn feeding mechanism and a weaving mechanism. The yarn feeding mechanism is located between the top cover of the circular weft machine and the frame table of the circular weft machine, and comprises a weft yarn guide disc, a weft yarn rack and a weft yarn guide distributed on the weft yarn guide disc, a warp yarn guide disc rack connected to the top cover of the circular weft machine at one end, a binding yarn rack and a binding yarn guide rack arranged from top to bottom on the inner side of the warp yarn guide disc rack, and a binding yarn guide rack connected to the binding yarn guide rack; a weaving mechanism is located between the top cover of the circular weft machine and the frame table of the circular weft machine. The circular knitting machine frame table is provided with an oblique needle cylinder installed on the frame table of the circular knitting machine, a needle groove located on the outer peripheral wall of the oblique needle cylinder, a triangular seat located on the outer periphery of the oblique needle cylinder and installed on the weft yarn guide disc, and a triangular seat gear installed on the bottom of the weft yarn guide disc. There is a knitting needle in the needle groove, and a needle cylinder triangle is provided on the inner side of the triangular seat. The single-sided double-needle track weft-knitted warp-inserted weft-inserted tubular fabric uses a variable weft plain needle as a binding system, which is composed of a first path The fabric is composed of five systems of yarns, namely, the binding coil, the second binding coil, the first weft yarn, the second weft yarn and the warp yarn. The first weft yarn, the second weft yarn and the warp yarn do not participate in the loop weaving; from the front side to the back side of the fabric, the order of the yarns is the second binding coil, the second weft yarn, the warp yarn, the first binding coil, the first weft yarn and the warp yarn; the warp yarn is located between the sinking loop of the first binding coil and the first weft yarn and between the sinking loop of the second binding coil and the second weft yarn, and the warp yarn is contained between the two front coils of each route; the first weft yarn is located behind the coil column of the first binding coil, above the sinking loop of the first binding coil, and blocked in front of the warp yarn; the second weft yarn is located behind the coil column of the second binding coil, above the sinking loop of the second binding coil, and blocked in front of the warp yarn.

2. A weaving method for a single-sided double-needle weft-knitted tubular fabric with warp and weft inlay, used for weaving the single-sided double-needle weft-knitted tubular fabric according to claim 1, characterized in that: The method comprises the following steps: S1, during the weaving process, the transmission mechanism is activated by a control mechanism, the oblique needle cylinder is fixed, the cam seat is driven by the cam seat belt and rotates synchronously with the binding yarn frame, the binding yarn guide, the weft yarn frame and the weft yarn guide, the old coil on the knitting needle is withdrawn from the needle hook to the needle bar, and the coil withdrawal is completed; S2, the first binding coil is padded into the odd-numbered needle hook, the lining warp yarn is padded into the weaving area along the gap between the two knitting needle grooves of the oblique needle cylinder, the first lining weft yarn is padded into the weaving area along the back of the knitting needle of the oblique needle cylinder, and is blocked by the coil column of the first new coil and is blocked in front of the lining warp yarn In the embodiment of the present invention, a first weft-knitted warp-inserted weft-inserted tubular structure is formed under the action of the pulling and winding mechanism; S3, the second binding coil is padded with the even-numbered needle hooks, and the lining warp yarn is padded into the weaving area along the gap between the needle grooves of the two knitting needles of the oblique needle cylinder, and the second lining weft yarn is padded into the weaving area along the back of the knitting needle of the oblique needle cylinder, and is blocked by the coil column of the second binding coil and blocked in front of the lining warp yarn. Under the action of the pulling and winding mechanism, the second weft-knitted warp-inserted weft-inserted tubular structure is formed, and the first and second weft-knitted warp-inserted weft-inserted tubular structures form a horizontal single-sided double-needle weft-knitted warp-inserted weft-inserted tubular fabric.

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