Automatic yarn carrier for three-dimensional variable cross-section weaving

Abstract

The application discloses an automatic yarn adding and reducing carrier for three-dimensional variable cross-section weaving, which comprises a yarn adding and reducing device, a glue pushing device and a yarn storage device arranged on a carrier main body, the carrier main body is a circular truncated cone, and is divided into five layers by steel plates, the upper three layers are the yarn adding and reducing device, the lower two layers are the glue pushing device and the yarn storage device respectively, and the two layers of steel plates are connected through double-end bolts; wherein the yarn adding and reducing device comprises a yarn processing mechanism, a transmission mechanism, a yarn pushing mechanism and a yarn shearing mechanism, the yarn adding and reducing device can drive the rack and the gear to move through a stepping motor, and can accurately, efficiently and conveniently complete the adding and reducing of multiple yarns in cooperation with the glue pushing device, so that the control mode of the carrier is simplified, and the carrier can be applied to a stepping type three-dimensional weaving machine and a rotary type weaving machine to complete the weaving of a variable cross-section preform.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of three-dimensional weaving mechanical equipment, and particularly relates to an automatic yarn adding and subtracting carrier for three-dimensional variable cross-section weaving. BACKGROUND

[0002] Three-dimensional weaving technology is a high-tech textile technology developed in the 1980s. By using this technology, a new type of composite material reinforcing structure is created, which has a completely integral, continuous and multidirectional fiber bundle network structure. This special network structure significantly improves the strength and stiffness of the material, making the material have excellent impact damage resistance and ablation resistance, strong fracture toughness, and especially the interlaminar connection strength is much better than other laminated materials.

[0003] Three-dimensional woven preforms can be woven using various high-performance fibers such as carbon fibers, silicon carbide fibers, aramid fibers, and glass fibers. In addition, it has the advantage of structural designability. By designing parameters such as fiber volume content and weaving angle, the use requirements of multifunctional composite materials (such as composite materials with ablation and heat protection functions) can be met. In addition, three-dimensional weaving technology also has the characteristics of near-net shaping, and can weave three-dimensional integral special-shaped preforms of various shapes and different sizes. Such as conical, dumbbell-shaped and other special-shaped practical preforms. Among them, the variable cross-section preform, which has a cross-section size that changes along the axial direction of the preform, needs to change the number of yarns participating in weaving and the yarn arrangement matrix through yarn adding and subtracting technology during weaving to realize the variable cross-section of the preform. The products manufactured by using this process technology have been successfully applied in the fields of aviation, aerospace, transportation, and shipbuilding.

[0004] The existing variable cross-section three-dimensional weaving mostly uses manual yarn adding and subtracting to realize weaving. In order to meet the requirements of automated production and reduce production costs, an easy-to-automatically-control yarn carrier is urgently needed to participate in the weaving work of the weaving machine. SUMMARY

[0005] The purpose of the present application is to provide an automatic yarn adding and subtracting carrier for three-dimensional variable cross-section weaving, which solves the problem of low efficiency of yarn adding and subtracting in current variable cross-section three-dimensional weaving.

[0006] The technical solution adopted by the present application is: an automatic yarn adding and subtracting carrier for three-dimensional variable cross-section weaving, the carrier main body is a circular truncated cone, and is divided into layers by a steel plate. The upper three layers are yarn adding and subtracting devices, the lower two layers are respectively a glue pushing device and a yarn storage device, and the upper and lower steel plates are connected by double-end bolts.

[0007] The present application is characterized in that,

[0008] The yarn adding and reducing device is divided into three groups, each group of yarn adding and reducing device comprises a transmission mechanism, a yarn pushing mechanism, a yarn cutting mechanism and a yarn processing mechanism; the transmission mechanism is located at the lower part of the steel plate and is connected with the yarn cutting mechanism respectively, for driving the yarn pushing mechanism and the yarn cutting mechanism; the yarn pushing mechanism is located at the middle part of the steel plate, is installed horizontally and drives the yarn processing mechanism to work;

[0009] The transmission mechanism comprises a longitudinally arranged transmission rod, the transmission rod is driven by a linear stepping motor; three groups of different length racks are distributed on both sides of the transmission rod; two racks in each group can drive two gears to rotate in two directions and control the rotation stroke of the gears when transmitting; a feeding mechanism is connected to each group of racks;

[0010] The first group of racks comprises rack one and rack two arranged on both sides of the upper part of the transmission rod; the feeding mechanism comprises gear one and gear two connected with rack one and rack two respectively; gear one is connected with horizontal rack one which is perpendicular to the transmission rod by ninety degrees; horizontal rack one is engaged with gear three connected to optical axis one; horizontal rack one is connected with guide rail one, guide rail one is connected with sliding block one, and guide rail one is connected with the yarn pushing mechanism; gear two is installed on optical axis two, gear four parallel to the end face of gear two is installed on optical axis two, horizontal rack two which is perpendicular to the transmission rod by ninety degrees is connected with gear four, horizontal rack two is connected with guide rail two, guide rail two is connected with sliding block two, guide rail two is connected with the yarn cutting mechanism, and sliding block one and sliding block two are connected to the carrier body shell respectively;

[0011] Rack five in the second group is twice as long as rack one, and rack six in the third group is three times as long as rack one; the feeding mechanisms are the same as the first group.

[0012] The yarn pushing mechanism comprises a connecting rod, an integrated block, a yarn guide ring, a yarn pushing rod and a spreading rod, the connecting rod is installed on guide rail one, the integrated block is connected perpendicularly to the connecting rod, the uppermost part of the integrated block is installed with the yarn guide ring, the middle part is installed with the yarn pushing rod, and the lower part is installed with the spreading rod; the yarn pushing rod and the spreading rod work in cooperation with the yarn processing mechanism.

[0013] The yarn cutting mechanism comprises a 90° reversing rod, a turning block one, a turning block two, a guide rail three, a sliding block three, a blade clamp block and a blade; one end of the 90° reversing rod is connected through the turning block one and the guide rail two, the other end is connected through the sliding block three and the guide rail three, the middle hole of the 90° reversing rod is sleeved on the vertical optical rod, one end of the guide rail three is connected with the blade clamp block, and the blade is fixed on the blade clamp block.

[0014] The yarn processing mechanism comprises a yarn processing frame, the middle part of the yarn processing frame is hollow, a rubber tube is arranged at the hollow part, left and right sides of the rubber tube are respectively provided with a left clamp and a right clamp for controlling the closing of the rubber tube, the outer sides of the left clamp and the right clamp are connected with the yarn processing frame through bolts, springs are nested on the bolts for clamping the clamps.

[0015] The pushing device comprises a servo motor, a ball screw connected to the servo motor, an installation block threadedly connected to the ball screw, a pushing base fixed to the installation block, a pushing rod fixedly connected to the pushing base, and a glue barrel connected to the pushing rod.

[0016] The yarn storage device comprises four yarn drums, which are evenly distributed on the steel plate, and comprises a yarn drum holder, a pulley one, a tension rod, a small metal rod, a pulley two, a baffle, a yarn drum, a metal block, a metal rod one and a metal rod two.

[0017] The linear stepping motor is located at the bottom layer of the steel plate, and the transmission rod is connected with the linear stepping motor through a connecting sheet.

[0018] The beneficial effects of the present application are that,

[0019] 1) The yarn carrier can realize intermittent glue feeding, automatic glue feeding during yarn increasing, and replace the twisting device of the previous yarn carrier, simplify the overall structure of the yarn carrier, and solve the problem of loose yarn after convergence.

[0020] 2) The yarn carrier reduces the number of stepping motors used, and simplifies the control difficulty. The yarn carrier only needs one stepping motor to control the transmission rod and cooperate with the glue feeding device to complete three or more times of yarn increasing and decreasing tasks, greatly reducing the number of motors used, and solving the control difficulty problem caused by multiple motors of the previous yarn carrier.

[0021] 3) The yarn storage device of the yarn carrier can realize the function of convenient yarn drum replacement. The metal rod on which the yarn drum is installed is divided into two sections, the two sections of the metal rod are connected in a hinged manner, the yarn drum baffle is loosened, force is applied to the left of the yarn drum, the metal rod two connected with the yarn drum deflects to the left, and the yarn drum can be removed. This solves the problem of disassembling the yarn storage device when replacing the yarn, making the yarn replacement more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the overall structure schematic diagram of the automatic yarn increasing and decreasing yarn carrier for three-dimensional variable cross-section weaving of the present application.

[0023] Figure 2 is the front view of the automatic yarn carrier for three-dimensional variable cross-section weaving of the present application;

[0024] Figure 3 is the structural schematic diagram of the yarn adding and reducing device of the present application;

[0025] Figure 4 is the structural schematic diagram of the yarn pushing mechanism of the present application;

[0026] Figure 5 is the structural schematic diagram of the yarn cutting mechanism of the present application;

[0027] Figure 6 is the partial schematic diagram of the transmission mechanism of the present application;

[0028] Figure 7 is the overall schematic diagram of the transmission mechanism of the present application;

[0029] Figure 8 is the structural schematic diagram of the glue pushing device of the present application

[0030] Figure 9 is the enlarged diagram of the glue pushing device of the present application;

[0031] Figure 10 is the schematic diagram of the yarn processing mechanism of the present application;

[0032] Figure 11 is the schematic diagram of the yarn storage device of the present application;

[0033] Figure 12 is the partial structural schematic diagram of the yarn storage device of the present application.

[0034] In the figure, 1. housing, 2. yarn adding and reducing device, 3. transmission device, 4. glue pushing device, 5. yarn storage device;

[0035] 1100. transmission mechanism, 1101. linear stepper motor, 1102. connecting piece, 1103. transmission rod, 1104. rack one, 1105. gear one, 1106. optical shaft one, 1107. gear three, 1108. transverse rack one, 1109. guide rail one, 1110. sliding block one, 1111. sliding block two, 1112. guide rail two, 1113. transverse rack two, 1114. gear four, 1115. optical shaft two, 1116. gear two, 1117. rack two, 1119. rack five, 1121. rack six;

[0036] 1200. yarn pushing mechanism, 1201. connecting rod, 1202. integrated block, 1203. yarn guide ring, 1204. yarn pushing rod, 1205, opening rod;

[0037] 1300. yarn cutting mechanism, 1302. 90° reversing lever, 1301. turning block one, 1303. turning block two, 1305. guide rail three, 1304. slide block three, 1306. blade clamp block, 1307. blade;

[0038] 1400. yarn processing mechanism, 1402. yarn processing frame, 1401. bolt, 1403. spring, 1404. rubber tube, 1405. left chuck, 1406. right chuck;

[0039] 401. servo motor, 402. ball screw, 403. mounting block, 404. rubber pushing base, 405. device base, 406. rubber bucket seat, 407. rubber bucket, 409. tee, 410. clamping piece, 411. rubber pushing rod;

[0040] 501. bobbin frame, 502. pulley one, 503. tension rod, 504. small metal rod, 505. pulley two, 506. baffle, 507. bobbin, 508. metal block, 509. metal rod one, 510. metal rod two. DETAILED DESCRIPTION

[0041] The application will be described in detail below with reference to the accompanying drawings and specific examples.

[0042] Example 1

[0043] A yarn carrier for three-dimensional variable cross-section weaving according to the present application, as shown in Figure 1 、 Figure 2 , comprises a shell 1, a yarn increasing and decreasing device 2, a rubber pushing device 4 and a yarn storage device 5. The main body of the yarn carrier is a circular truncated cone, which is divided into five layers and includes six circular steel plates. Each circular steel plate is connected by three double-end bolts. The yarn increasing and decreasing device 2 is divided into three sets and is installed in the first, second and third layers from top to bottom. The rubber pushing device 4 is installed in the fourth layer, and the yarn storage device 5 is installed in the fifth layer. The shell 1 protects the yarn increasing and decreasing device 2, the rubber pushing device 4 and the yarn storage device 5.

[0044] Example 2

[0045] The difference from example 1 is that

[0046] As shown in Figure 3As shown, the yarn increasing and decreasing device 2 is divided into three groups, each group has similar structure, and each group of yarn increasing and decreasing mechanism includes transmission mechanism 1100, push yarn mechanism 1200, yarn cutting mechanism 1300 and yarn processing mechanism 1400. The transmission mechanism 1100 is located at the lower part of the steel plate, which is connected with the push yarn mechanism 1200 and the yarn cutting mechanism 1300 respectively, and is used to drive the push yarn mechanism 1200 and the yarn cutting mechanism 1300; the push yarn mechanism 1200 is located in the middle of the circular stainless steel plate and is installed horizontally, which drives the left movement and drives the yarn processing mechanism to work; the yarn cutting mechanism 1300 is located at the upper part of the steel plate, which drives the blade to move up and down.

[0047] As shown in Figure 4 , the push yarn mechanism includes connecting rod 1201, integrated block 1202, yarn guide ring 1203, push yarn rod 1204 and opening rod 1205, the connecting rod 1201 is installed on the guide rail one 1109, the integrated block 1202 is connected with the connecting rod 1201 vertically, the yarn guide ring 1203 is installed on the uppermost part of the integrated block 1202, the push yarn rod 1204 is installed in the middle, and the opening rod 1205 is installed below, the push yarn rod 1204 and the opening rod 1205 work with the yarn processing mechanism 1400 on the left side.

[0048] As shown in Figure 5 , the yarn cutting mechanism includes 90° reversing rod 1302, turning block one 1301, turning block two 1303, guide rail three 1305, sliding block three 1304, blade clamp block 1306 and blade 1307; one end of the 90° reversing rod 1302 is connected with the turning block one 1301 and the guide rail two 1112, the other end is connected with the guide rail three 1305 through the sliding block three 1304, the middle hole of the 90° reversing rod 1302 is sleeved on the vertical light pole, one end of the guide rail three 1305 is connected with the blade clamp block 1306, and the blade 1307 is fixed on the blade clamp block 1306.

[0049] As shown in Figures 6-7 , the transmission mechanism is divided into three groups, each group is driven by the same step motor and transmission rod, and the transmission structure of each group is similar, the transmission mechanism 1100 includes a longitudinally arranged transmission rod 1103, which is driven by a linear step motor 1101; three groups of different length racks are distributed on both sides of the transmission rod 1103; in each group, two racks can drive two gears to rotate in two directions and control the rotation stroke of the gears; a feeding mechanism is connected on each group of racks;

[0050] The first set of racks includes rack one 1104 and rack two 1117 disposed on both sides of the upper part of the transmission rod 1103; the feeding mechanism includes gear one 1105 and gear two 1116 respectively connected to rack one 1104 and rack two 1117; gear one 1105 is mounted on one end of optical shaft one 1106, and gear one 1105 is connected to a transverse rack one 1108 perpendicular to the transmission rod 1103 at a 90-degree angle; transverse rack one 1108 meshes with gear three 1107 connected to the other end of optical shaft one 1106; transverse rack one 1108 is connected to guide rail one 1109, and guide rail one 1109 is connected to... A slider 1110 is connected to a guide rail 1109, which is connected to a yarn pushing mechanism 1200. A gear 2 1116 is installed at one end of an optical shaft 2 1115, and a gear 4 1114 parallel to the end face of the gear 2 1116 is installed at the other end of the optical shaft 2 1115. The gear 4 1114 is connected to a transverse rack 2 1113 perpendicular to the transmission rod 1103 at a 90-degree angle. The transverse rack 2 1113 is connected to a guide rail 2 1112. The guide rail 2 1112 is connected to a slider 2 1111. The guide rail 2 1112 is connected to a yarn cutting mechanism 1300. Slider 1 1110 and slider 2 1111 are respectively connected to the main housing 1 of the yarn carrier.

[0051] In the second group, rack 5 1119 is twice as long as rack 1 1104 in the first group, and rack 6 1121 in the third group is three times as long as rack 1 1104. The feeding mechanisms are the same as those in the first group, so they will not be described again.

[0052] like Figure 8 , Figure 9 As shown, the yarn processing mechanism 1400 includes a yarn processing frame 1402. The yarn processing frame 1402 has a hollow center, and a rubber tube 1404 is provided in the hollow center. A left clamp 1405 and a right clamp 1406 for controlling the closure of the rubber tube are respectively provided on the left and right sides of the rubber tube 1404. The outer sides of the left clamp 1405 and the right clamp 1406 are connected to the yarn processing frame 1402 by bolts 1401. A spring 1403 is nested on the bolt 1401 to tighten the clamp.

[0053] like Figure 10 As shown, the glue-pushing device 4 includes a servo motor 401, which is mounted on one side of the device base 405. A mounting block 403 is threaded onto a ball screw 402 connected to the servo motor 401. A glue-pushing base 404 is fixed on the mounting block 403. A glue-pushing rod 411 is fixedly connected to the glue-pushing base 404. The glue-pushing rod 411 is connected to a glue tank 407. The glue tank 407 is mounted on a glue tank seat 406 and fixed with a clamp 410. The glue tank 407 is connected to a glue tube 1404. A three-way pipe 409 is also connected to the glue tube 1404 for feeding glue to each yarn processing mechanism 1400.

[0054] likeFigures 11-12 As shown, the yarn storage device 5 has four, evenly distributed on the steel plate, including the yarn drum frame 501, the pulley one 502, the tension rod 503, the small metal rod 504, the pulley two 505, the baffle 506, the yarn drum 507, the metal block 508, the metal rod one 509, the metal rod two 510; the upper half of the yarn drum frame 501 has a round hole, a spring with the same hole diameter is installed in the round hole, the metal block 508 is pressed on the upper part of the spring, the pulley one 502 is installed on the upper end of the tension rod 503, the small metal rod 504 passes through the arc-shaped hole in the middle of the tension rod 503 and the small round hole on the metal block 508, so that the tension rod 503 moves up and down in the fixed area; the pulley two 505 is installed on the lower half of the yarn drum frame 501 and is fixed with bolts, the metal rod one 509 is fixed in the round hole of the upper half of the yarn drum frame 501, the metal rod two 510 is hinged with the metal rod one 509, the yarn drum 507 passes through the metal rod two 510, is installed between the upper part of the metal rod one 509 and the lower part of the metal rod two 510, one end of the baffle 506 is hinged with the bottom of the yarn drum frame 501, the other end of the baffle 506 is clamped at the bottom of the metal rod two 510 to fix the yarn drum.

[0055] Example 3

[0056] The working process of the present application is: the purpose of the yarn carrier for three-dimensional variable cross-section weaving is to realize automatic yarn increasing and decreasing of multiple yarns by using one stepping motor, and the loose yarn after yarn increasing is bundled by using intermittent glue dropping mode.

[0057] In the yarn storage device, the main yarn is wound out from the yarn drum, two fixed pulleys and a tension device in sequence, and is finally sent into the weaving area above the yarn carrier to participate in the weaving work. The auxiliary yarn is wound out from the yarn storage device like the main yarn, and is respectively threaded into the yarn processing devices of three layers, and the end of the yarn is held by the clamp in the yarn processing device.

[0058] The working process of the yarn carrier for three-dimensional variable cross-section weaving will be described below when the yarn is increased and decreased respectively:

[0059] (1) When the yarn needs to be increased, the stepper motor of the yarn carrier receives a positive signal, the stepper motor moves up one stroke, the transmission rod 1103 moves up, the rack one 1104 and the rack two 1117 move, the rack one 1104 on the left side of the transmission rod 1103 drives the gear one 1105 to rotate counterclockwise, so that the yarn pushing mechanism 1200 moves to the left, the yarn pushing rod 1204 in the yarn pushing mechanism 1200 pushes the yarn to the glue dropping groove of the yarn processing mechanism 1400, at the same time, the servo motor 401 in the glue pushing device 4 receives an electric signal, drives the ball screw 402 to rotate, and then drives the glue pushing rod 411 to move, so that the glue flows into the glue pipe; the opening rod in the yarn pushing mechanism 1200 opens the left chuck 1405 and the right chuck 1406, at this time the glue pipe is unobstructed, the glue flows out, and the main and auxiliary yarns are bonded; at the same time, the chuck is loosened, the auxiliary yarn is free, the main yarn is bundled with the auxiliary yarn, and passes through the guide ring at the same time, the auxiliary yarn participates in weaving together with the main yarn, at this time, the first yarn increasing is completed; when the second yarn increasing is needed, the stepper motor moves up one stroke again, the second layer yarn pushing device moves, and the first layer yarn increasing is the same, at this time, two auxiliary yarns and a main yarn are bundled together to participate in weaving, and the second yarn increasing is completed; the third yarn increasing is the same as the previous two times, after three times of yarn increasing, three auxiliary yarns and the main yarn are bundled together to participate in weaving. In the process of increasing the yarn, in order to prevent the yarn from loosening, the glue pushing device intermittently discharges glue, so that the main and auxiliary yarns are bundled.

[0060] (2) The yarn is reduced from the third layer, and three auxiliary yarns are cut off in turn; when the yarn is reduced for the first time, the stepper motor of the yarn carrier receives a reverse signal, the stepper motor moves down one stroke, the transmission rod 1103 moves down, the rack one 1104 and the rack two 1117 move, the rack one 1104 on the left side of the transmission rod 1103 drives the gear one 1105 to rotate clockwise, so that the yarn pushing device moves to the right, at this time, the opening rod moves to the right, the glue pushing device moves reversely, the glue at the position of the glue head is drawn out to avoid the glue from blocking the glue pipe; the two chucks in the yarn processing device move to the middle to clamp the auxiliary yarn and the glue pipe; the guide ring drives the yarn to move to the right, the yarn pushing rod leaves the glue dropping groove of the yarn processing device; at the same time, the gear two 1116 rotates counterclockwise, passes through the gear and rack transmission 90° reversing rod, drives the blade to move to the yarn, at this time the upper part of the yarn is fixed, the lower end is clamped by the chuck in the yarn processing device, and is in a taut state, the blade moves to the yarn during the movement, the yarn is cut off, and the yarn is reduced once; when the yarn is reduced for the second time, the stepper motor drives the transmission rod to move down one stroke again, which is the same as the principle of the first yarn reduction, the yarn processing device clamps the yarn, the blade cuts off the auxiliary yarn, and the second yarn reduction is completed; the third yarn reduction is the same as the previous two times, and the main yarn is left to participate in weaving after the third yarn reduction.

Claims

1. An automatic yarn feeder for three-dimensional variable cross-section knitting, characterized in that, It includes an active yarn carrier for variable cross-section three-dimensional weaving. The main body of the yarn carrier is a truncated cone, which is divided into 5 layers by steel plates. The top three layers are yarn addition and subtraction devices (2), and the bottom two layers are a pusher device (4) and a yarn storage device (5). The upper and lower steel plates are connected by double-headed bolts. The yarn increasing / decreasing device (2) is divided into three groups. Each group of yarn increasing / decreasing device (2) includes a transmission mechanism (1100), a yarn pushing mechanism (1200), a yarn cutting mechanism (1300), and a yarn processing mechanism (1400). The transmission mechanism (1100) is located at the lower part of the steel plate and is connected to the yarn pushing mechanism (1200) and the yarn cutting mechanism (1300) respectively, and is used to drive the yarn pushing mechanism (1200) and the yarn cutting mechanism (1300). The yarn pushing mechanism (1200) is located in the middle of the steel plate, installed laterally, and drives the yarn processing mechanism (1400) to work. The yarn pushing mechanism (1200) includes a connecting rod (1201), an integrated block (1202), a yarn guide ring (1203), a yarn pushing rod (1204), and a spreading rod (1205). The connecting rod (1201) is mounted on a guide rail (1109). The integrated block (1202) is vertically connected to the connecting rod (1201). The yarn guide ring (1203) is installed at the top of the integrated block (1202), the yarn pushing rod (1204) is installed in the middle, and the spreading rod (1205) is installed at the bottom. The yarn pushing rod (1204) and the spreading rod (1205) work in conjunction with the yarn processing mechanism (1400). The yarn cutting mechanism (1300) includes a 90° reversing rod (1302), a first steering block (1301), a second steering block (1303), a third guide rail (1305), a third slider (1304), a blade clamping block (1306), and a blade (1307). One end of the 90° reversing rod (1302) is connected to the second guide rail (1112) via the first steering block (1301), and the other end is connected to the third guide rail (1305) via the third slider (1304). The middle circular hole of the 90° reversing rod (1302) is fitted onto the vertical guide rod. One end of the third guide rail (1305) is connected to the blade clamping block (1306), and the blade (1307) is fixed on the blade clamping block (1306).

2. The automatic yarn feeding device for three-dimensional variable cross-section knitting according to claim 1, characterized in that, The transmission mechanism (1100) includes a longitudinally arranged transmission rod (1103), which is driven by a linear stepper motor (1101). Three sets of racks of different lengths are distributed on both sides of the transmission rod (1103). In each set, two racks can drive two gears to rotate in two directions and control the rotation stroke of the gears during transmission. Each set of racks is connected to a feeding mechanism. The first set of racks includes rack one (1104) and rack two (1117) disposed on both sides of the upper part of the transmission rod (1103); the feeding mechanism includes gear one (1105) and gear two (1116) respectively connected to rack one (1104) and rack two (1117); gear one (1105) is installed at one end of optical shaft one (1106), and gear one (1105) is connected to a transverse rack one (1108) perpendicular to the transmission rod (1103) at a 90-degree angle; the transverse rack one (1108) meshes with gear three (1107) connected to the other end of optical shaft one (1106); the transverse rack one (1108) is connected to guide rail one (1109), and guide rail one (1109) A slider 1 (1110) is connected to the upper part, and a guide rail 1 (1109) is connected to a yarn pushing mechanism (1200). The gear 2 (1116) is installed at one end of the optical shaft 2 (1115), and a gear 4 (1114) parallel to the end face of the gear 2 (1116) is installed at the other end of the optical shaft 2 (1115). The gear 4 (1114) is connected to a transverse rack 2 (1113) perpendicular to the transmission rod (1103) at a 90-degree angle. The transverse rack 2 (1113) is connected to the guide rail 2 (1112). The guide rail 2 (1112) is connected to the slider 2 (1111). The guide rail 2 (1112) is connected to the yarn cutting mechanism (1300). The slider 1 (1110) and slider 2 (1111) are respectively connected to the main body shell of the yarn carrier. In the second group, rack five (1119) is twice the length of rack one (1104), and in the third group, rack six (1121) is three times the length of rack one (1104). The feeding mechanisms are the same as those in the first group.

3. The automatic yarn feeding device for three-dimensional variable cross-section knitting according to claim 1, characterized in that, The yarn processing mechanism (1400) includes a yarn processing frame (1402), which has a hollow center. A rubber tube (1404) is provided in the hollow center. A left clamp (1405) and a right clamp (1406) for controlling the closure of the rubber tube (1404) are respectively provided on the left and right sides of the rubber tube (1404). The outer sides of the left clamp (1405) and the right clamp (1406) are connected to the yarn processing frame (1402) by bolts (1401). A spring (1403) is nested on the bolt (1401) for tightening the clamp.

4. The automatic yarn feeding device for three-dimensional variable cross-section knitting according to claim 3, characterized in that, The glue-pushing device (4) includes a servo motor (401), which is mounted on one side of the device base (405). A mounting block (403) is threaded onto a ball screw (402) connected to the servo motor (401). A glue-pushing base (404) is fixed on the mounting block (403). A glue-pushing rod (411) is fixedly connected to the glue-pushing base (404). The glue-pushing rod (411) is connected to a glue bucket (407). The glue bucket (407) is mounted on a glue bucket seat (406) and fixed with a clamp (410). The glue bucket (407) is connected to a glue tube (1404). A three-way pipe (409) is also connected to the glue tube (1404) for feeding glue to each yarn processing mechanism (1400).

5. The automatic yarn feeding and feeding device for three-dimensional variable cross-section knitting according to claim 1, characterized in that, The yarn storage device (5) consists of four components evenly distributed on a steel plate, including a yarn tube frame (501), pulley one (502), tension rod (503), small metal rod (504), pulley two (505), baffle (506), yarn tube (507), metal block (508), metal rod one (509), and metal rod two (510). The upper part of the yarn tube frame (501) has a circular hole, in which a spring of the same diameter as the hole is installed. A metal block (508) is pressed on the upper part of the spring. Pulley one (502) is installed on the upper end of the tension rod (503). The small metal rod (504) passes through the middle of the tension rod (503). The arc-shaped hole and the small round hole on the metal block (508) allow the tension rod (503) to move up and down in the fixed area; the pulley two (505) is installed on the lower half of the yarn tube frame (501) and fixed with bolts; the metal rod one (509) is fixed in the round hole in the upper half of the yarn tube frame (501); the metal rod two (510) is hinged to the metal rod one (509); the yarn tube (507) passes through the metal rod two (510) and is installed between the upper part of the metal rod one (509) and the lower part of the metal rod two (510); one end of the baffle (506) is hinged to the bottom of the yarn tube frame (501); the other end of the baffle (506) is stuck at the bottom of the metal rod two (510) to fix the yarn tube.

6. The automatic yarn feeding device for three-dimensional variable cross-section knitting according to claim 2, characterized in that, The linear stepper motor (1101) is located at the bottom of the steel plate, and the transmission rod (1103) is connected to the linear stepper motor (1101) through the connecting piece (1102).

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