Continuous weft laying device of multi-axial warp knitting machine and laying method of continuous weft laying device

Abstract

The invention relates to the technical field of weft laying of warp knitting machines, in particular to a continuous weft laying device of a multi-axial warp knitting machine and a laying method of the continuous weft laying device. The weft laying trolley is arranged on the cross beam in a reciprocating sliding mode in the Y direction through a first driving assembly. The weft laying trolley comprises a trolley body, a yarn guide, a yarn pressing plate, a downward-pressing driving assembly and a third driving assembly, the downward-pressing driving assembly drives the mounting support to drive the yarn guide and the yarn pressing plate to ascend and descend in the Z direction, and the third driving assembly drives the mounting support to drive the yarn guide and the yarn pressing plate to move in the X direction; the yarn locking assembly comprises a chain needle plate and a yarn receiving trolley, the chain needle plate can move in the X direction through a chain set, and the yarn receiving trolley can be arranged on a supporting beam of the warp knitting machine in the X direction in a sliding mode through a second driving assembly. Continuous weft laying operation is achieved, and the overall production efficiency of equipment is improved; meanwhile, yarn clamping loss is reduced, thread residue waste is avoided, the raw material utilization rate is increased, and production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of warp knitting machine weft laying technology, and in particular to a continuous weft laying device and laying method for a multi-axial warp knitting machine. Background Technology

[0002] Multiaxial warp knitting machines are key equipment for producing composite material substrates. The efficiency and quality of their weft laying process directly determine the mechanical properties, raw material utilization, and production costs of the fabric.

[0003] In the early stages of multiaxial warp knitting technology development, the industry generally adopted a non-continuous step-lay-out process. Its core working logic is as follows: After the yarn is drawn out from the yarn frame, it is adjusted to a suitable tension by the tension control mechanism, and then clamped and fixed at the starting end by the pneumatic or mechanical clamp-type gripper on the weft-laying head; then the weft-laying head carries the clamped yarn bundle and moves laterally at a uniform speed from one end to the other along the machine width direction. During this movement, the yarn is laid flat on the workbench or conveyor screen; after the weft-laying head reaches the target position, the laid yarn is mechanically temporarily fixed by needle punching or special hook punching device, and then the yarn is cut by the cutting shears at the end point; after the yarn is cut, the weft-laying head releases the gripper and returns to the starting position at high speed without load. This return process has no weft-laying operation value and is an ineffective waste of time; after the weft-laying head returns to the starting point, it clamps the yarn again and starts the next round of weft-laying cycle, and so on.

[0004] For scenarios requiring the laying of fabrics at multiple angles such as +45° and -45°, traditional techniques require multiple independent weft laying heads to work in sequence. After laying one angle layer, the worktable needs to be moved or rotated to the next angle position, and the above step-by-step weft laying process is repeated to achieve the superposition and laying of multi-angle fabric layers.

[0005] However, the aforementioned traditional step-by-step weft-laying process has many drawbacks: First, due to the inherent limitations of yarn cutting and the return of the weft-laying head during idle travel, the production process is forced to be interrupted, making continuous operation impossible and directly restricting overall production efficiency; Second, although the weft-laying head can achieve a high moving speed during the lateral laying stage, the frequent start-stop operations and idle travel take up a lot of time, significantly reducing the average production rate of the equipment and making it difficult to meet the needs of high-speed industrial production; Third, the cutting action of each weft-laying cycle generates a large number of yarn ends, and there is inherent yarn loss during the clamping process of the yarn, both of which lead to a significant decrease in raw material utilization and indirectly increase production costs. Summary of the Invention

[0006] This invention provides a continuous weft laying device and laying method for a multi-axial warp knitting machine, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A continuous weft-laying device for a multi-axial warp knitting machine includes: a crossbeam spanning the width direction of the warp knitting machine, a weft-laying trolley slidably mounted on the crossbeam, and yarn-locking components correspondingly disposed at two yarn-pulling inflection points of the warp knitting machine. The weft-laying trolley is equipped with a first drive assembly, which can be reciprocated and slidably mounted on the crossbeam along the Y direction. The weft-laying trolley includes a trolley body, a yarn guide, a yarn pressing plate, a downward pressure drive assembly, and a third drive assembly. The yarn guide and the yarn pressing plate are mounted on the trolley body via a mounting bracket. The downward pressure drive assembly drives the mounting bracket to move the yarn guide and the yarn pressing plate up and down along the Z direction. The third drive assembly drives the mounting bracket to move the yarn guide and the yarn pressing plate along the X direction. The yarn locking assembly includes a chain needle plate and a yarn receiving carriage. The chain needle plate can move along the X direction via a chain assembly. The yarn receiving carriage is equipped with a second drive assembly, which can slide along the X direction on the support beam of the warp knitting machine.

[0008] Furthermore, it also includes angle adjustment components disposed at both ends of the crossbeam; The angle adjustment component includes a moving part and a supporting part; The top of the support is fixedly connected to the lower part of the crossbeam end, and the bottom of the support is rotatably mounted on the moving part via a rotating disk; The moving part drives the supporting part to move synchronously along the X direction, cooperating with the rotation of the supporting part below the crossbeam to change the weft laying angle of the crossbeam in the width direction.

[0009] Furthermore, the moving part includes a mounting plate, two guide plates, two connecting shafts, and two adjusting shafts; The two connecting shafts and the two adjusting shafts are symmetrically installed at both ends of the mounting plate and pass through it along the Y direction. The two connecting shafts extend out of the two ends of the mounting plate and are respectively connected to the two guide plates. A gap is left between the two guide plates and the mounting plate. The adjusting shaft is equipped with bearings on the shaft sections located in the two gaps, and the outer ring of the bearing is in rolling contact with the support beam.

[0010] Furthermore, the adjusting shaft includes an intermediate shaft section and two eccentric shaft sections; the two eccentric shaft sections are symmetrically arranged at both ends of the intermediate shaft section and are eccentrically arranged with respect to the axis of the intermediate shaft section. The bearing is mounted on the eccentric shaft section, and the two ends of the two eccentric shaft sections extend outward and pass through the two guide plates to form a hexagonal drive shaft section; A through hole is provided radially at the middle position of the intermediate shaft section, and a through hole is provided on the mounting plate corresponding to the through hole. When the through hole and the through hole are aligned, a limit pin is embedded therein. When the adjusting shaft rotates to the first position, the mounting plate is lifted, and at this time the outer circle of the bearing makes rolling contact with the support beam; when the adjusting shaft rotates to the second position, the mounting plate makes contact with the surface of the support beam, and the bearing does not make contact with the support beam.

[0011] Furthermore, the first drive assembly includes a first servo motor, a first synchronous pulley group, and a linear guide rail group; The weft-laying trolley is slidably mounted on the crossbeam via the linear guide rail assembly and is fixed to one side of the conveyor belt of the first synchronous pulley assembly via a connector. The first servo motor drives the weft-laying trolley to reciprocate along the Y direction via the first synchronous pulley assembly.

[0012] Furthermore, the downward drive assembly includes a second servo motor, a second synchronous pulley group, a first ball screw group, and a wear-resistant plate. The wear-resistant plate is bolted to the bottom of the lead screw of the first ball screw group, forming a synchronous linkage structure with the lead screw. The second servo motor achieves transmission cooperation through the internal second synchronous pulley group and the first ball screw group to drive the wear-resistant plate to move up and down along the Z direction, thereby realizing the lifting and lowering action of the pressing plate.

[0013] Furthermore, the third drive assembly includes a third servo motor, a second ball screw assembly, a mounting base, an optical axis, and a lifting plate. The optical axis passes through both ends of the mounting base along the Z direction and connects to the mounting bracket and the lifting plate, respectively. The lifting plate is slidably mounted on the wear-resistant plate in the X direction via guide wheels fitted on its side wall; The third servo motor is driven by the second ball screw assembly to move the mounting base left and right in the X direction, thereby linking the mounting bracket, the yarn guide, and the yarn pressing plate to move synchronously.

[0014] Furthermore, the second drive assembly includes a needle plate, a linear guide rail assembly, a third synchronous pulley assembly, a planetary reducer, and a fourth servo motor; The needle plate is mounted on the support beam via the linear guide rail assembly. The fourth servo motor is connected to the planetary reducer, and the output end of the planetary reducer is linked to the third synchronous pulley assembly. Power is transmitted sequentially through the fourth servo motor, the planetary reducer, and the third synchronous pulley assembly, driving the needle plate to reciprocate along the linear guide rail assembly.

[0015] The present invention also provides a method for laying the continuous weft laying device of a multi-axial warp knitting machine as described above, comprising: Yarn splicing: Activate the first drive component to drive the weft laying trolley to move from left to right along the Y direction of the crossbeam. At the same time, control the weft laying trolley's pressing plate to move up along the Z direction through the downward drive component, so that the yarn is pulled to the yarn pulling inflection point position according to the preset yarn path. Yarn hanging: When the weft laying trolley moves to the yarn pulling inflection point, its left pressure plate is in the middle area between the steel needle on the chain needle plate and the W needle on the yarn receiving trolley. The left pressure plate is driven downward in the Z direction by the downward driving component, pressing the yarn in the preset yarn path into the needle groove of the steel needle, realizing the initial positioning of the yarn and the steel needle. The left pressure plate remains pressed and synchronously drives the weft laying trolley and the yarn receiving trolley to move in the X direction, that is, the opposite direction of the chain movement. During the movement, the moving speed of the yarn receiving trolley is controlled to be slightly faster than that of the weft laying trolley. The speed difference is used to compensate for the yarn position deviation, so that the yarn is initially hung on the chain needle plate. Yarn pressing: After the yarn is hung, the left pressing plate of the weft laying trolley is moved upward along the Z direction by the pressing drive component, so that the weft laying trolley is disengaged from the yarn receiving trolley; then the weft laying trolley is driven by the first drive component to move in the opposite direction from right to left along the Y direction. After maintaining a preset safe distance from the yarn receiving trolley, the right pressing plate is driven by the pressing drive component to press downward along the Z direction, so as to compact the yarn hanging on the chain needle plate a second time. Reset and Cyclic Laying: When the yarn pressing action is performed synchronously, the yarn receiving trolley returns to the starting position along the preset trajectory to reset and wait for the next round of yarn receiving; after the yarn pressing is completed, the weft laying trolley moves along the Y direction through the first drive component to the other end of the laying area, repeats the above yarn receiving, yarn hanging, and yarn pressing steps, and enters the next round of yarn laying cycle to realize continuous weft laying operation.

[0016] Furthermore, during yarn splicing, the pressure plate of the weft-laying trolley moves up in the Z direction at a height higher than the highest point of the chain needle plate and the W needle of the yarn splicing trolley; When hanging yarn, the downward pressing distance of the yarn pressing plate on the left side along the Z direction is less than the downward pressing distance of the yarn pressing plate on the right side when pressing yarn.

[0017] The technical solution of this invention can achieve the following technical effects: Through multi-directional coordinated transmission of the weft-laying carriage, chain needle plate, and yarn-joining carriage, continuous weft-laying operation is achieved, improving the overall production efficiency of the equipment. Furthermore, the elimination of yarn cutting action avoids yarn waste. Simultaneously, the precise yarn pressing and positioning by the yarn pressure plate replaces traditional clamping devices, reducing yarn clamping losses, improving raw material utilization, and lowering production costs. In addition, through precise yarn guiding by the yarn guide, controllable downward pressing and positioning by the yarn pressure plate, and synchronous transmission between the chain needle plate and the yarn-joining carriage, yarn splicing and positioning are achieved, ensuring flat and reliable yarn laying, preventing yarn slippage and misalignment, and improving the consistency of the final fabric's mechanical properties. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural diagram of the continuous weft laying device for a multi-axial warp knitting machine; Figure 2 A front view and a partially enlarged view of the continuous weft laying device of a multi-axial warp knitting machine; Figure 3 for Figure 1 A-direction projection view; Figure 4 This is a top view of the continuous weft laying device of a multi-axial warp knitting machine; Figure 5 A schematic diagram of the weft-laying trolley; Figure 6 for Figure 1 A magnified view of section B; Figure 7 This is a schematic diagram of the angle adjustment component; Figure 8 This is a schematic diagram of the adjusting shaft. Figure 9 This is a schematic diagram of the yarn splicing process and a magnified view of a portion thereof; Figure 10 This is a schematic diagram and a magnified view of the yarn hanging state; Figure 11 This is a schematic diagram and a magnified view of the yarn pressing state.

[0020] Reference numerals: 1. Crossbeam; 2. Weft-laying carriage; 21. Carriage body; 22. Yarn guide; 23. Yarn pressing plate; 24. Downward pressure drive assembly; 241. Wear-resistant plate; 25. Third drive assembly; 251. Mounting base; 252. Optical shaft; 253. Lifting plate; 26. Mounting bracket; 3. Chain needle plate; 4. Yarn-feeding carriage; 5. First drive assembly; 6. Second drive assembly; 7. Angle adjustment assembly; 71. Moving part; 711. Mounting plate; 712. Guide plate; 713. Connecting shaft; 714. Adjusting shaft; 714a. Intermediate shaft section; 714b. Eccentric shaft section; 714c. Hexagonal drive shaft section; 715. Bearing; 716. Limiting pin; 72. Support part; 73. Rotating disk. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Example 1: like Figure 1-5 As shown, this application provides a continuous weft laying device for a multi-axial warp knitting machine, including: a crossbeam 1 spanning the width direction of the warp knitting machine, a weft laying trolley 2 slidably mounted on the crossbeam 1, and yarn locking components correspondingly arranged at two yarn pulling inflection points of the warp knitting machine. The weft-laying trolley 2 is equipped with a first drive component 5, which can be reciprocated and slidably mounted on the crossbeam 1 along the Y direction; The weft-laying trolley 2 includes a trolley body 21, a yarn guide 22, a yarn pressing plate 23, a downward pressure drive assembly 24, and a third drive assembly 25. The yarn guide 22 and the yarn pressing plate 23 are mounted on the trolley body 21 via a mounting bracket 26. The downward pressure drive assembly 24 drives the yarn guide 22 and the yarn pressing plate 23 to move up and down in the Z direction via the driving mounting bracket 26. The third drive assembly 25 drives the yarn guide 22 and the yarn pressing plate 23 to move in the X direction via the driving mounting bracket 26. The yarn locking assembly includes a chain needle plate 3 and a yarn receiving carriage 4. The chain needle plate 3 can move along the X direction via a chain assembly. The yarn receiving carriage 4 is equipped with a second drive assembly 6, which allows it to slide along the X direction on the support beam of the warp knitting machine. It should be noted that the Y direction refers to the width direction of the warp knitting machine, the Z direction refers to the vertical direction, and the X direction refers to the length direction of the warp knitting machine.

[0024] During weft laying, the weft laying trolley 2 moves from left to right along the Y direction, pulling the yarn to the yarn-pulling inflection point. At the same time, the left-side pressing plate 23 moves up along the Z direction. After reaching the yarn-pulling inflection point, the left-side pressing plate 23 moves down along the Z direction, pressing the yarn into the needle groove of the chain needle plate 3. Meanwhile, the yarn-attaching trolley 4 moves synchronously with the weft laying trolley 2 along the X direction, which is the opposite direction of the chain movement. At this time, the speed of the yarn-attaching trolley 4 is controlled to be slightly greater than the speed of the weft laying trolley 2. After moving one weft laying width, the weft laying trolley 2 moves up along the Z direction and moves back along the Y direction from right to left. After moving a distance away from the yarn-attaching trolley 4, the right-side pressing plate 23 presses down, causing the yarn to detach from the yarn-attaching trolley 4 and hook into the chain needle plate 3. At the same time, the yarn-attaching trolley 4 returns to the starting point, waiting for the next cycle of yarn attachment. Then, the weft laying trolley 2 returns to the yarn-pulling state and moves to the other side of the fabric to lay the yarn in the same way. This cycle repeats to complete continuous weft laying.

[0025] Through multi-directional coordinated transmission between the yarn locking assembly and the weft laying carriage 2, continuous weft laying operations are achieved, improving the overall production efficiency of the equipment. Furthermore, the elimination of yarn cutting action avoids yarn waste. Simultaneously, the precise yarn pressing and positioning by the yarn pressing plate 23 replaces the traditional clamping device, reducing yarn clamping losses, improving raw material utilization, and lowering production costs. In addition, through precise yarn guiding by the yarn guide 22, controllable downward pressing and positioning by the yarn pressing plate 23, and synchronous transmission between the chain needle plate 3 and the yarn receiving carriage 4, yarn connection and positioning are achieved, ensuring flat and reliable yarn laying, preventing yarn slippage and misalignment, and improving the consistency of the final fabric's mechanical properties.

[0026] like Figure 6-7 As shown, the weft laying device also includes angle adjustment components 7 disposed at both ends of the crossbeam 1; the angle adjustment components 7 include a moving part 71 and a supporting part 72; The top of the support part 72 is fixedly connected to the lower end of the crossbeam 1, and the bottom of the support part 72 is rotatably mounted on the moving part 71 via the rotating disk 73. The moving part 71 drives the supporting part 72 to move synchronously along the X direction, which, in conjunction with the rotation of the supporting part 72 below the crossbeam 1, changes the weft laying angle of the crossbeam 1 in the width direction.

[0027] Through the coordinated design of the moving part 71, the support part 72 and the rotating disk 73, the weft laying angle of the crossbeam 1 can be continuously and accurately adjusted without the need to add multiple weft laying heads or modify the workbench. This simplifies the equipment structure and reduces costs. It can quickly switch angles to connect the continuous weft laying process without stopping the machine, and can also ensure the synchronization and stability of the adjustment, improve the equipment's versatility and angle adaptability, and ensure the working accuracy at different angles.

[0028] Based on the above embodiments, preferably, the moving part 71 includes a mounting plate 711, two guide plates 712, two connecting shafts 713 and two adjusting shafts 714; the two connecting shafts 713 and the two adjusting shafts 714 are respectively symmetrically installed at both ends of the mounting plate 711 and pass through along the Y direction, and the two ends of the two connecting shafts 713 extending out of the mounting plate 711 are respectively connected to the two guide plates 712; There is a gap between the two guide plates 712 and the mounting plate 711. The adjusting shaft 714 is equipped with bearings 715 on the shaft sections of the two gaps. The outer ring of the bearing 715 is in rolling contact with the support beam.

[0029] A clearance is provided between the two guide plates 712 and the mounting plate 711. This clearance, combined with the bearing 715 positioned within the clearance section of the adjusting shaft 714, serves two purposes. First, the rolling contact between the bearing 715 and the support beam converts sliding friction into rolling friction, significantly reducing the frictional resistance of the moving part 71 when moving in the X direction. This results in smoother movement and faster response, meeting the demands of rapid synchronous movement during angle adjustment. Second, the bearing 715 structure reduces wear during movement, extending component lifespan. The clearance also prevents interference between the guide plates 712 and the mounting plate 711 due to vibration or thermal expansion and contraction, ensuring operational stability. Furthermore, the symmetrical arrangement of the double guide plates 712 and the double sets of shafts ensures balanced force on the moving part 71, further improving the straightness of movement in the X direction. This guarantees precise synchronous displacement of the moving parts 71 at both ends of the crossbeam 1, laying the foundation for accurate subsequent angle rotation adjustments.

[0030] As a preferred embodiment of the above, such as Figure 8 As shown, the adjusting shaft 714 includes an intermediate shaft section 714a and two eccentric shaft sections 714b; the two eccentric shaft sections 714b are symmetrically arranged at both ends of the intermediate shaft section 714a and are eccentrically arranged with respect to the axis of the intermediate shaft section 714a. The bearing 715 is mounted on the eccentric shaft section 714b. The two ends of the two eccentric shaft sections 714b extend outward and pass through the two guide plates 712 to form a hexagonal drive shaft section 714c. A through hole is provided radially at the middle position of the intermediate shaft section 714a, and a through hole is provided on the mounting plate 711 corresponding to the through hole. When the through hole and the through hole are aligned, a limit pin 716 is embedded. When the adjusting shaft 714 rotates to the first position, the mounting plate 711 is lifted, and at this time, the outer circle of the bearing 715 rolls into contact with the support beam. When the adjusting shaft 714 rotates to the second position, the mounting plate 711 contacts the surface of the support beam, and the bearing 715 does not contact the support beam. It should be noted that the second position is reached after rotating 180° from the first position; when the movable part 71 is movable, the adjusting shaft 714 rotates to the first position, and when the movable part 71 is fixed, the adjusting shaft 714 rotates to the second position.

[0031] During adjustment, the adjusting shaft 714 is rotated to the first position to lift the mounting plate 711, so that the bottom surface of the mounting plate 711 is kept at a preset distance from the support beam. The limiting pin 716 passes through the through hole and the through hole to ensure that the adjusting shaft 714 is circumferentially fixed. At this time, only the bearing 715 on the adjusting shaft 714 is in contact with the support beam, and the smooth displacement of the moving part 71 is achieved by means of rolling friction. After the adjustment is completed, the adjusting shaft 714 is rotated 180° to the second position, and the mounting plate 711 moves down accordingly. The bearing 715 is retracted into the gap between the guide plate 712 and the mounting plate 711. The bottom surface of the mounting plate 711 is in close contact with the support beam to achieve rigid positioning, which prevents the moving part 71 from shifting due to vibration during the weft laying operation, thus taking into account both adjustment flexibility and positioning stability.

[0032] In a preferred embodiment of the present invention, the first drive assembly 5 includes a first servo motor, a first synchronous pulley set, and a linear guide rail set. The weft-laying carriage 2 is slidably mounted on the crossbeam 1 via the linear guide rail set and fixed to one side of the conveyor belt of the first synchronous pulley set via a connecting member. The first servo motor drives the weft-laying carriage 2 to reciprocate along the Y direction via the first synchronous pulley set. The combined structure of the servo motor, synchronous pulley set, and linear guide rail set ensures the accuracy and stability of the weft-laying carriage 2's movement in the Y direction, adapting to the high-speed operation requirements of continuous weft laying.

[0033] In a preferred embodiment of the present invention, the downward drive assembly 24 includes a second servo motor, a second synchronous pulley group, a first ball screw group, and a wear-resistant plate 241. The wear-resistant plate 241 is bolted to the lower part of the lead screw of the first ball screw group, forming a synchronous linkage structure with the lead screw. The second servo motor, through its internal second synchronous pulley set and first ball screw set, drives the wear-resistant plate 241 to move up and down along the Z direction, thereby achieving the lifting and lowering action of the yarn pressing plate 23. During operation, the second servo motor can adjust its speed as needed to precisely control the lifting speed and stopping position of the wear-resistant plate 241. Through the precise speed adjustment and positioning control of the second servo motor, the lifting speed and stopping position of the wear-resistant plate 241 can be flexibly adjusted according to different operating parameters such as yarn material and fabric thickness, adapting to diverse weft laying needs; at the same time, it forms a precise linkage with the actions of the yarn splicing carriage 4 and the chain needle plate 3, further improving the reliability of yarn hanging and pressing through speed and position coordination.

[0034] Based on the above scheme, the third drive assembly 25 includes a third servo motor, a second ball screw assembly, a mounting base 251, an optical shaft 252, and a lifting plate 253. The optical shaft 252 passes through both ends of the mounting base 251 along the Z direction and connects to the mounting bracket 26 and the lifting plate 253 respectively. The lifting plate 253 is slidably mounted on the wear-resistant plate 241 in the X direction via the guide wheels mounted on its side wall; the third servo motor is driven by the second ball screw group to drive the mounting base 251 to move left and right in the X direction, thereby linking the mounting bracket 26, yarn guide 22, and yarn pressing plate 23 to move synchronously.

[0035] The precise positioning and speed adjustment of the mounting base 251 in the X direction are achieved through the cooperation of the third servo motor and the second ball screw assembly. The through connection of the optical axis 252 in the Z direction can ensure the verticality and stability of the mounting bracket 26 when it moves. The lifting plate 253 slides on the wear-resistant plate 241 with the guide wheel, which not only provides auxiliary guidance for the X direction movement, but also connects the lifting action of the pressing drive component 24. It can accurately adapt to the X direction position adjustment requirements of the yarn guide 22 and the pressing plate 23, and form an efficient synergy with the continuous weft laying and multi-angle weft laying functions of the overall device.

[0036] In this invention, the second drive assembly 6 includes a needle plate, a linear guide rail assembly, a third synchronous pulley assembly, a planetary reducer, and a fourth servo motor. The needle plate is mounted on the support beam via the linear guide rail assembly. The fourth servo motor is connected to the planetary reducer, and the output end of the planetary reducer is linked to the third synchronous pulley assembly. Power is transmitted sequentially through the fourth servo motor, the planetary reducer, and the third synchronous pulley assembly, driving the needle plate to reciprocate along the linear guide rail assembly.

[0037] The fourth servo motor, in conjunction with the planetary reducer, enables speed reduction and torque increase, as well as precise speed adjustment, meeting the speed difference compensation requirements between the yarn splicing and the weft laying carriage 2. The third synchronous pulley set ensures that the power is transmitted without slippage. Combined with the guiding effect of the linear guide rail set, it makes the reciprocating motion of the needle plate smooth and without deviation, accurately receiving the yarn and cooperating with the weft laying carriage 2 to complete the yarn hanging action, improving the reliability and stability of continuous weft laying.

[0038] Example 2: Based on the same inventive concept as the multi-axial warp knitting machine continuous weft laying device described in the foregoing embodiments, the present invention also provides a laying method for the multi-axial warp knitting machine continuous weft laying device, such as... Figure 9-11 As shown, the laying method includes: Yarn splicing: Start the first drive component 5 to drive the weft laying trolley 2 to move from left to right along the Y direction of the crossbeam 1. At the same time, control the pressing plate 23 of the weft laying trolley 2 to move up along the Z direction through the pressing drive component 24, so that the yarn is pulled to the yarn pulling inflection point position according to the preset yarn path. Yarn hanging: When the weft laying trolley 2 moves to the yarn pulling inflection point, its left yarn pressing plate 23 is in the middle area between the steel needle on the chain needle plate 3 and the W needle on the yarn receiving trolley 4. The left yarn pressing plate 23 is driven to press down in the Z direction by the downward driving component 24, pressing the yarn in the preset yarn path into the needle groove of the steel needle, realizing the initial positioning of the yarn and the steel needle; The left-side pressing plate 23 remains pressed, synchronously driving the weft-laying carriage 2 and the yarn-joining carriage 4 to move in the X direction, which is the opposite direction of the chain movement. During the movement, the speed of the yarn-joining carriage 4 is controlled to be slightly faster than that of the weft-laying carriage 2. The speed difference is used to compensate for the yarn position deviation, so that the yarn is initially attached to the chain needle plate 3. This ensures that the yarn is tightly and accurately attached to the chain needle plate 3, achieving a reliable yarn-attaching effect. Yarn pressing: After the yarn is hung, the left yarn pressing plate 23 of the weft laying carriage 2 is moved upward in the Z direction by the downward pressing drive component 24, so that the weft laying carriage 2 is disengaged from the yarn receiving carriage 4; then the weft laying carriage 2 is driven by the first drive component 5 to move in the opposite direction from right to left in the Y direction. After maintaining a preset safe distance from the yarn receiving carriage 4, the right yarn pressing plate 23 is driven by the downward pressing drive component 24 to press down in the Z direction, so as to perform secondary pressing on the yarn hung on the chain needle plate 3; to ensure that the yarn is hung firmly and reliably, and to prevent problems such as detachment and loosening; Reset and Cyclic Laying: When the yarn pressing action is performed synchronously, the yarn receiving trolley 4 returns to the starting position along the preset trajectory to reset and wait for the next round of yarn receiving; after the yarn pressing is completed, the weft laying trolley 2 moves along the Y direction through the first drive component 5 to the other end of the laying area, repeats the above yarn receiving, yarn hanging and yarn pressing steps, and enters the next round of yarn laying cycle to realize continuous weft laying operation.

[0039] In the yarn splicing stage, the first drive component 5 moves the weft-laying trolley in the Y direction, while the lower drive component 24 raises and lowers the yarn-pressing plate 23 in the Z direction. In the yarn hanging stage, the third drive component 25 moves the weft-laying trolley 2 in the X direction, and the precise speed adjustment structure of the yarn-splicing trolley 4 compensates for speed differences. In the yarn pressing stage, the independent action design of the double-sided yarn-pressing plates 23 completes secondary pressing. The overall process avoids the yarn cutting and empty return steps of traditional processes. Through the coordinated linkage and cyclic operation of the above steps, the weft-laying device can achieve precise, efficient and continuous yarn laying, ensuring the stability and consistency of yarn laying.

[0040] As a preferred option, when splicing yarn, the pressing plate 23 of the weft laying carriage 2 moves up in the Z direction to a height higher than the highest point of the chain needle plate 3 and the needle of the splicing carriage 4W, to prevent the pressing plate 23 from interfering with or colliding with the steel needle. When hanging yarn, the downward pressing distance of the left yarn pressing plate 23 along the Z direction is less than the downward pressing distance of the right yarn pressing plate 23 when pressing yarn. Hanging yarn only requires preliminary positioning of the yarn. Short pressing distance can avoid damaging the yarn. Pressing yarn requires secondary pressing to prevent slippage. Long pressing distance can ensure that the yarn is firmly fixed.

[0041] The laying method described above in this invention can be effectively applied to the continuous weft laying device of a multi-axial warp knitting machine, and the technical effects it can achieve are as described in the above embodiments, and will not be repeated here.

[0042] Although this application has been described in conjunction with specific features and embodiments, it is apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of this application. Accordingly, this specification and accompanying drawings are merely exemplary illustrations of the application as defined herein, and are to be considered as covering any and all modifications, variations, combinations, or equivalents within the scope of this application. Clearly, those skilled in the art can make various alterations and modifications to this application without departing from its scope. Thus, if such modifications and modifications fall within the scope of this application and its equivalents, this application is intended to include such modifications and modifications.

Claims

1. A continuous weft-laying device for a multi-axial warp knitting machine, characterized in that, include: A crossbeam spanning the width of the warp knitting machine, a weft-laying trolley slidably mounted on the crossbeam, and yarn-locking assemblies correspondingly positioned at the two yarn-pulling inflection points of the warp knitting machine; The weft-laying trolley is equipped with a first drive assembly, which can be reciprocated and slidably mounted on the crossbeam along the Y direction. The weft-laying trolley includes a trolley body, a yarn guide, a yarn pressing plate, a downward pressure drive assembly, and a third drive assembly. The yarn guide and the yarn pressing plate are mounted on the trolley body via a mounting bracket. The downward pressure drive assembly drives the mounting bracket to move the yarn guide and the yarn pressing plate up and down along the Z direction. The third drive assembly drives the mounting bracket to move the yarn guide and the yarn pressing plate along the X direction. The yarn locking assembly includes a chain needle plate and a yarn receiving carriage. The chain needle plate can move along the X direction via a chain assembly. The yarn receiving carriage is equipped with a second drive assembly, which can slide along the X direction on the support beam of the warp knitting machine.

2. The continuous weft laying device for a multi-axial warp knitting machine according to claim 1, characterized in that, It also includes angle adjustment components disposed at both ends of the crossbeam; The angle adjustment component includes a moving part and a supporting part; The top of the support is fixedly connected to the lower part of the crossbeam end, and the bottom of the support is rotatably mounted on the moving part via a rotating disk; The moving part drives the supporting part to move synchronously along the X direction, cooperating with the rotation of the supporting part below the crossbeam to change the weft laying angle of the crossbeam in the width direction.

3. The multi-axial warp knitting machine continuous weft laying device according to claim 2, characterized in that, The movable part includes a mounting plate, two guide plates, two connecting shafts, and two adjusting shafts; The two connecting shafts and the two adjusting shafts are symmetrically installed at both ends of the mounting plate and pass through it along the Y direction. The two connecting shafts extend out of the two ends of the mounting plate and are respectively connected to the two guide plates. A gap is left between the two guide plates and the mounting plate. The adjusting shaft is equipped with bearings on the shaft sections located in the two gaps, and the outer ring of the bearing is in rolling contact with the support beam.

4. The multi-axial warp knitting machine continuous weft laying device according to claim 3, characterized in that, The adjusting shaft includes an intermediate shaft section and two eccentric shaft sections; the two eccentric shaft sections are symmetrically arranged at both ends of the intermediate shaft section and are eccentrically arranged with respect to the axis of the intermediate shaft section. The bearing is mounted on the eccentric shaft section, and the two ends of the two eccentric shaft sections extend outward and pass through the two guide plates to form a hexagonal drive shaft section; A through hole is provided radially at the middle position of the intermediate shaft section, and a through hole is provided on the mounting plate corresponding to the through hole. When the through hole and the through hole are aligned, a limit pin is embedded therein. When the adjusting shaft rotates to the first position, the mounting plate is lifted, and the outer circle of the bearing makes rolling contact with the support beam; when the adjusting shaft rotates to the second position, the mounting plate makes contact with the surface of the support beam, and the bearing does not make contact with the support beam.

5. The multi-axial warp knitting machine continuous weft laying device according to claim 1, characterized in that, The first drive assembly includes a first servo motor, a first synchronous pulley group, and a linear guide rail group; The weft-laying trolley is slidably mounted on the crossbeam via the linear guide rail assembly and is fixed to one side of the conveyor belt of the first synchronous pulley assembly via a connector. The first servo motor drives the weft-laying trolley to reciprocate along the Y direction via the first synchronous pulley assembly.

6. The multi-axial warp knitting machine continuous weft laying device according to claim 1, characterized in that, The downward drive assembly includes a second servo motor, a second synchronous pulley group, a first ball screw group, and a wear-resistant plate. The wear-resistant plate is bolted to the bottom of the lead screw of the first ball screw group, forming a synchronous linkage structure with the lead screw. The second servo motor achieves transmission cooperation through the internal second synchronous pulley group and the first ball screw group to drive the wear-resistant plate to move up and down along the Z direction, thereby realizing the lifting and lowering action of the pressing plate.

7. The multi-axial warp knitting machine continuous weft laying device according to claim 6, characterized in that, The third drive assembly includes a third servo motor, a second ball screw assembly, a mounting base, an optical axis, and a lifting plate. The optical axis passes through both ends of the mounting base along the Z direction and connects to the mounting bracket and the lifting plate respectively. The lifting plate is slidably mounted on the wear-resistant plate in the X direction via guide wheels fitted on its side wall; The third servo motor is driven by the second ball screw assembly to move the mounting base left and right in the X direction, thereby linking the mounting bracket, the yarn guide, and the yarn pressing plate to move synchronously.

8. The continuous weft laying device for a multi-axial warp knitting machine according to claim 1, characterized in that, The second drive assembly includes a needle plate, a linear guide rail assembly, a third synchronous pulley assembly, a planetary reducer, and a fourth servo motor; The needle plate is mounted on the support beam via the linear guide rail assembly. The fourth servo motor is connected to the planetary reducer, and the output end of the planetary reducer is linked to the third synchronous pulley assembly. Power is transmitted sequentially through the fourth servo motor, the planetary reducer, and the third synchronous pulley assembly, driving the needle plate to reciprocate along the linear guide rail assembly.

9. A method for laying the continuous weft laying device of a multi-axial warp knitting machine as described in any one of claims 1-8, characterized in that, include: catch Yarn: Start the first drive component to drive the weft laying trolley to move from left to right along the Y direction of the crossbeam. At the same time, control the weft laying trolley's pressing plate to move up along the Z direction through the downward drive component, so that the yarn is pulled to the yarn pulling inflection point position according to the preset yarn path. Yarn hanging: When the weft laying trolley moves to the yarn pulling inflection point, its left pressure plate is in the middle area between the steel needle on the chain needle plate and the W needle on the yarn receiving trolley. The left pressure plate is driven downward in the Z direction by the downward driving component, pressing the yarn in the preset yarn path into the needle groove of the steel needle, realizing the initial positioning of the yarn and the steel needle. The left pressure plate remains pressed and synchronously drives the weft laying trolley and the yarn receiving trolley to move in the X direction, that is, the opposite direction of the chain movement. During the movement, the moving speed of the yarn receiving trolley is controlled to be slightly faster than that of the weft laying trolley. The speed difference is used to compensate for the yarn position deviation, so that the yarn is initially hung on the chain needle plate. Yarn pressing: After the yarn is hung, the left pressing plate of the weft laying trolley is moved upward along the Z direction by the pressing drive component, so that the weft laying trolley is disengaged from the yarn receiving trolley; then the weft laying trolley is driven by the first drive component to move in the opposite direction from right to left along the Y direction. After maintaining a preset safe distance from the yarn receiving trolley, the right pressing plate is driven by the pressing drive component to press downward along the Z direction, so as to compact the yarn hanging on the chain needle plate a second time. Reset and Cyclic Laying: When the yarn pressing action is performed synchronously, the yarn receiving trolley returns to the starting position along the preset trajectory to reset and wait for the next round of yarn receiving; after the yarn pressing is completed, the weft laying trolley moves along the Y direction through the first drive component to the other end of the laying area, repeats the above yarn receiving, yarn hanging, and yarn pressing steps, and enters the next round of yarn laying cycle to realize continuous weft laying operation.

10. The laying method of the continuous weft laying device for a multi-axial warp knitting machine according to claim 9, characterized in that, During yarn splicing, the pressure plate of the weft laying trolley moves up in the Z direction to a height higher than the highest point of the chain needle plate and the W needle of the yarn splicing trolley; When hanging yarn, the downward pressing distance of the yarn pressing plate on the left side along the Z direction is less than the downward pressing distance of the yarn pressing plate on the right side when pressing yarn.

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