Multi-axial warp knitting machine continuous weft laying device and laying method thereof

Abstract

The present application relates to the technical field of warp knitting machine laying, in particular to a multi-axial warp knitting machine continuous laying device and its laying method, comprising: a crossbeam, a laying trolley and a yarn locking assembly; the laying trolley is reciprocally slidably arranged on the crossbeam along the Y direction through a first driving assembly; the laying trolley comprises a trolley body, a yarn guide, a presser bar, a pressing driving assembly and a third driving assembly, the pressing driving assembly drives the mounting bracket to drive the yarn guide and the presser bar to move up and down along the Z direction, and the third driving assembly drives the mounting bracket to drive the yarn guide and the presser bar to move along the X direction; the yarn locking assembly comprises a chain needle plate and a yarn receiving trolley, the chain needle plate can move along the X direction through a chain assembly, and the yarn receiving trolley can be slidably arranged on the support beam of the warp knitting machine along the X direction through a second driving assembly. The present application realizes continuous laying operation, improves the overall production efficiency of the equipment, reduces the yarn clamping loss, avoids the waste of thread ends, improves the raw material utilization rate, and reduces the production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of warp laying technology of warp knitting machine, and particularly to a continuous warp laying device of multi-axial warp knitting machine and a laying method thereof. BACKGROUND

[0002] The multi-axial warp knitting machine is a key equipment for producing composite material base material, and the efficiency and quality of the warp laying link directly determine the mechanical properties of the fabric, the raw material utilization rate and the production cost.

[0003] In the early stage of the development of the multi-axial warp knitting technology, the non-continuous step-by-step warp laying process is generally used in the industry, and the core working logic is that the yarn is drawn out from the yarn frame, adjusted to the appropriate tension by the tension control mechanism, clamped and fixed at the starting end by the pneumatic or mechanical jaw type clamp on the warp laying head, then the warp laying head carries the clamped yarn bundle and moves uniformly and horizontally from one end to the other end along the width direction of the machine, the yarn is laid flat on the workbench or the transmission net curtain during the moving process, the laid yarn is mechanically fixed by the needling or special hooking device after the warp laying head reaches the target position, and then the yarn is cut off at the end point by the cutting knife, the clamp is released after the yarn is cut off, and the warp laying head returns to the starting position at a high speed, which is an invalid empty stroke consumption, and the next round of warp laying cycle is started after the warp laying head is reset to the starting point, and the process is repeated.

[0004] For the scene of laying +45°, -45° and other multiple angle fabrics, the traditional technology needs to be equipped with multiple independent warp laying heads to work in sequence, the workbench needs to be moved or rotated to the next angle position after laying one angle layer, and the above step-by-step warp laying process needs to be repeated to realize the superimposed laying of multiple angle fabric layers.

[0005] However, the above-mentioned traditional step-by-step warp laying process has many defects: first, the production process is forced to be interrupted due to the inherent link of cutting yarn and empty stroke return of the warp laying head, and continuous operation cannot be realized, which directly restricts the overall production efficiency; second, although the horizontal laying stage of the warp laying head can achieve a high moving speed, the frequent start-stop operation and empty stroke return occupy a large amount of working hours, which significantly reduces the average production rate of the equipment, and it is difficult to meet the needs of industrial high-speed production; third, the cutting action of each warp laying cycle produces a large amount of yarn ends, and there is inherent yarn loss during the clamping process of the clamp, which leads to a significant decrease in raw material utilization rate and indirectly increases the production cost. SUMMARY

[0006] The present application provides a continuous warp laying device of multi-axial warp knitting machine and a laying method thereof, which can effectively solve the problems in the background art.

[0007] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0008] A multi-axial warp knitting machine continuous weft laying device, comprising: a cross beam arranged across the width direction of the warp knitting machine, a weft laying trolley slidingly arranged on the cross beam, and a yarn locking assembly arranged corresponding to two yarn pulling inflection point positions of the warp knitting machine;

[0009] The weft laying trolley is provided with a first driving assembly, and can be reciprocally slid along the Y direction and arranged on the cross beam through the first driving assembly;

[0010] The weft laying trolley comprises a trolley body, a yarn guide, a presser plate, a pressing driving assembly and a third driving assembly, the yarn guide and the presser plate are arranged on the trolley body through a mounting bracket, the pressing driving assembly drives the mounting bracket to drive the yarn guide and the presser plate to move up and down along the Z direction, and the third driving assembly drives the mounting bracket to drive the yarn guide and the presser plate to move along the X direction;

[0011] The yarn locking assembly comprises a chain needle plate and a yarn receiving trolley, the chain needle plate can move along the X direction through a chain assembly, and the yarn receiving trolley is provided with a second driving assembly, and can be slidably arranged on the support beam of the warp knitting machine along the X direction through the second driving assembly.

[0012] Further, an angle adjusting assembly arranged at both ends of the cross beam is further included;

[0013] The angle adjusting assembly comprises a moving part and a supporting part;

[0014] The top of the supporting part is fixedly connected below the end of the cross beam, and the bottom of the supporting part is rotatably arranged on the moving part through a rotating disc;

[0015] The moving part drives the supporting part to move synchronously along the X direction, and cooperates with the rotation of the supporting part below the cross beam to change the weft laying angle of the cross beam in the width direction.

[0016] Further, the moving part comprises a mounting plate, two guide plates, two connecting shafts and two adjusting shafts;

[0017] The two connecting shafts and the two adjusting shafts are respectively symmetrically arranged at both ends of the mounting plate and penetrate along the Y direction, and the two connecting shafts extending out of both ends of the mounting plate are respectively connected with the two guide plates;

[0018] Gaps are left between the two guide plates and the mounting plate, bearings are arranged on the shaft sections of the two adjusting shafts located in the gaps, and the outer rings of the bearings are in rolling contact with the support beam.

[0019] Further, the adjusting shaft comprises a middle shaft segment and two eccentric shaft segments; the two eccentric shaft segments are symmetrically arranged at two ends of the middle shaft segment and are arranged eccentrically with respect to the axis of the middle shaft segment;

[0020] The bearing is mounted on the eccentric shaft segment, and the two ends of the two eccentric shaft segments extend outward and penetrate the two guide plates, forming a hexagonal driving shaft segment;

[0021] A through hole is arranged radially at the middle position of the middle shaft segment, the mounting plate is provided with a through hole corresponding to the through hole, and the through hole is inlaid with a limiting pin when the through hole is aligned with the through hole;

[0022] When the adjusting shaft is rotated to a first position, the mounting plate is lifted, at which time the outer circle of the bearing is in rolling contact with the support beam; and when the adjusting shaft is rotated to a second position, the mounting plate is in surface contact with the support beam, and the bearing is not in contact with the support beam.

[0023] Further, the first driving assembly comprises a first servo motor, a first synchronous pulley set and a linear guide rail set;

[0024] The weft laying trolley is slidably arranged on the cross beam through the linear guide rail set and is fixed to one side of the transmission belt of the first synchronous pulley set through a connecting piece, and the first servo motor drives the weft laying trolley to reciprocally move along the Y direction through the first synchronous pulley set.

[0025] Further, the pressing driving assembly comprises a second servo motor, a second synchronous pulley set, a first ball screw set and a wear-resistant plate, the wear-resistant plate is connected below the screw rod of the first ball screw set through bolts and forms a synchronous linkage structure with the screw rod;

[0026] The second servo motor realizes transmission cooperation through the second synchronous pulley set and the first ball screw set inside to drive the wear-resistant plate to move up and down along the Z direction, thereby realizing the lifting action of the presser plate.

[0027] Further, the third driving assembly comprises a third servo motor, a second ball screw set, a mounting seat, an optical shaft and a lifting plate, the optical shaft penetrates the two ends of the mounting seat along the Z direction and is connected with the mounting bracket and the lifting plate respectively;

[0028] The lifting plate is slidably arranged on the wear-resistant plate along the X direction through the guide wheels assembled on the side wall of the lifting plate;

[0029] The third servo motor drives the mounting seat to move left and right along the X direction through the second ball screw set, thereby driving the mounting bracket and the thread guide and the presser plate to move synchronously.

[0030] Further, the second driving assembly comprises a needle plate, a linear guide rail set, a third synchronous pulley set, a planetary reducer and a fourth servo motor;

[0031] The needle plate is mounted on the support beam through the linear guide rail set, the fourth servo motor is in driving connection with the planetary reducer, the output end of the planetary reducer is linked with the third synchronous pulley set, power is sequentially transmitted through the fourth servo motor, the planetary reducer and the third synchronous pulley set, and the needle plate is driven to reciprocate along the linear guide rail set.

[0032] The application further provides a laying method of the multi-axial warp knitting machine continuous weft laying device.

[0033] Yarn picking: the first driving assembly is started to drive the weft laying trolley to move from left to right along the cross beam Y direction, and the yarn pressing plate of the weft laying trolley is controlled to move upward along the Z direction through the pressing driving assembly, so that the yarn is pulled to the yarn pulling inflection point position according to the preset yarn path;

[0034] Yarn hanging: when the weft laying trolley moves to the yarn pulling inflection point position, the left yarn pressing plate is located in the middle area between the steel needle of the chain needle plate and the W needle of the yarn picking trolley, the left yarn pressing plate is driven to press downward along the Z direction through the pressing driving assembly, the yarn in the preset yarn path is pressed into the needle groove of the steel needle, and the preliminary positioning of the yarn and the steel needle is realized; the left yarn pressing plate remains in the pressing state, the weft laying trolley and the yarn picking trolley are synchronously driven to move along the X direction, i.e. the reverse direction of the chain movement; during the movement, the moving speed of the yarn picking trolley is slightly faster than that of the weft laying trolley, the position deviation of the yarn is compensated through the speed difference, and the yarn is preliminarily hung on the chain needle plate;

[0035] Yarn pressing: after the yarn hanging is completed, the left yarn pressing plate of the weft laying trolley is controlled to move upward along the Z direction through the pressing driving assembly, so that the weft laying trolley and the yarn picking trolley are separated; then the weft laying trolley is reversely driven to move from right to left along the Y direction through the first driving assembly, after keeping a preset safety distance from the yarn picking trolley, the right yarn pressing plate is driven to press downward along the Z direction through the pressing driving assembly, and the yarn hung on the chain needle plate is pressed again;

[0036] Resetting and circulating laying: when the yarn pressing is synchronously performed, the yarn picking trolley returns to the starting position along the preset track to reset and wait for the next yarn picking; after the yarn pressing is completed, the weft laying trolley moves to the other end of the laying area along the Y direction through the first driving assembly, the above-mentioned yarn picking, yarn hanging and yarn pressing steps are repeated, the next round of yarn laying circulation is entered, and the continuous weft laying operation is realized.

[0037] Further, the moving height of the yarn pressing plate of the weft laying trolley in the Z direction is higher than the highest point of the chain needle plate and the W needle of the yarn picking trolley during the yarn picking;

[0038] The downward pressing distance of the left pressing plate in the Z direction is less than the downward pressing distance of the right pressing plate during the pressing of the yarn.

[0039] The technical scheme can realize the following technical effects:

[0040] Through the multi-directional cooperative transmission of the weft laying trolley, the chain needle plate and the yarn receiving trolley, continuous weft laying operation is realized, the overall production efficiency of the equipment is improved, there is no yarn cutting action, waste of thread ends is avoided, the yarn is accurately positioned by the pressing plate instead of traditional clamping, yarn clamping loss is reduced, raw material utilization is improved, and production cost is reduced. In addition, through the accurate yarn guiding of the yarn guide, the controllable downward positioning of the pressing plate, the synchronous transmission cooperation of the chain needle plate and the yarn receiving trolley, yarn connection and positioning are realized, the yarn laying is flat and fixed, the yarn is prevented from being buckled and deviated, and the mechanical properties of the final fabric are improved. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0042] Figure 1 It is a schematic view of the three-dimensional structure of the multi-axial warp knitting machine continuous weft laying device.

[0043] Figure 2 It is a front view and a partial enlarged view of the multi-axial warp knitting machine continuous weft laying device.

[0044] Figure 3 It is a projection view of A of Figure 1 .

[0045] Figure 4 It is a top view of the multi-axial warp knitting machine continuous weft laying device.

[0046] Figure 5 It is a schematic view of the structure of the weft laying trolley.

[0047] Figure 6 It is a partial enlarged view of B of Figure 1 .

[0048] Figure 7 It is a schematic view of the structure of the angle adjusting assembly.

[0049] Figure 8 It is a schematic view of the structure of the adjusting shaft.

[0050] Figure 9 It is a schematic view of the yarn receiving state and a partial enlarged view.

[0051] Figure 10 This is a schematic diagram and a magnified view of the yarn hanging state;

[0052] Figure 11 This is a schematic diagram and a magnified view of the yarn pressing state.

[0053] 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

[0054] 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.

[0055] 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.

[0056] Example 1:

[0057] like Figures 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.

[0058] 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;

[0059] The weft laying trolley 2 comprises a trolley body 21, a yarn guide 22, a yarn pressing plate 23, a pressing driving assembly 24 and a third driving assembly 25, the yarn guide 22 and the yarn pressing plate 23 are assembled on the trolley body 21 through a mounting bracket 26, the pressing driving assembly 24 drives the yarn guide 22 and the yarn pressing plate 23 to move up and down along the Z direction through the driving mounting bracket 26, and the third driving assembly 25 drives the yarn guide 22 and the yarn pressing plate 23 to move along the X direction through the driving mounting bracket 26;

[0060] The yarn locking assembly comprises a chain needle plate 3 and a yarn receiving trolley 4, the chain needle plate 3 is capable of moving along the X direction through a chain assembly, and the yarn receiving trolley 4 is provided with a second driving assembly 6 and is capable of sliding along the X direction on a 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.

[0061] During weft laying, the weft laying trolley 2 moves from left to right along the Y direction to pull the yarn to the yarn pulling inflection point position, and at the same time, the left yarn pressing plate 23 moves up along the Z direction; after reaching the yarn pulling inflection point position, the left yarn pressing plate 23 moves down along the Z direction to press the yarn into the needle slot of the chain needle plate 3, and the yarn receiving trolley 4 and the weft laying trolley 2 move synchronously along the X direction, that is, move in the opposite direction of the chain movement, at this time, the speed of the yarn receiving trolley 4 is slightly greater than that of the weft laying trolley 2, after moving a weft laying width, the weft laying trolley 2 moves up along the Z direction, and moves back from right to left along the Y direction to a distance away from the yarn receiving trolley 4, then the right yarn pressing plate 23 is pressed down to make the yarn be hung into the chain needle plate 3 from the yarn receiving trolley 4, at the same time, the yarn receiving trolley 4 returns to the starting point to wait for the next cycle of yarn receiving; then, the weft laying trolley 2 returns to the yarn pulling state and moves to the other side of the cloth surface to lay the weft according to the above steps, and the continuous weft laying is completed through the above steps.

[0062] Through the multi-directional cooperative transmission of the yarn locking assembly and the weft laying trolley 2, continuous weft laying operation is realized, and the overall production efficiency of the equipment is improved; and there is no yarn cutting action, so the thread waste is avoided, at the same time, through the accurate yarn pressing positioning of the yarn pressing plate 23 to replace the traditional clamping of the clamping device, the yarn clamping loss is reduced, the raw material utilization rate is improved, and the production cost is reduced. In addition, through the accurate yarn guiding of the yarn guide 22, the controllable down pressing positioning of the yarn pressing plate 23, the synchronous transmission cooperation of the chain needle plate 3 and the yarn receiving trolley 4, the yarn connection and positioning are realized, the yarn laying is ensured to be flat and fixed reliably, the yarn disconnection and deviation are avoided, and the mechanical property consistency of the final fabric is improved.

[0063] As shown in Figures 6-7 , the weft laying device further comprises an angle adjusting assembly 7 arranged at both ends of the cross beam 1; the angle adjusting assembly 7 comprises a moving part 71 and a supporting part 72;

[0064] The top of the support part 72 is fixedly connected below the end of the cross beam 1, and the bottom of the support part 72 is rotatably arranged on the moving part 71 through the rotating disc 73;

[0065] The moving part 71 drives the support part 72 to move synchronously along the X direction, and cooperates with the rotation of the support part 72 below the cross beam 1 to change the weft laying angle of the cross beam 1 in the width direction.

[0066] Through the cooperative design of the moving part 71, the support part 72 and the rotating disc 73, the weft laying angle of the cross beam 1 is continuously and accurately adjustable, without the need to add multiple weft laying heads or modify the workbench, which simplifies the equipment structure and reduces the cost. The device can quickly switch the angle to connect the continuous weft laying process without stopping, can ensure the adjustment synchronization and stability, can improve the universality and angle adaptation range of the device, and can ensure the operation accuracy at different angles.

[0067] On the basis of the above embodiment, preferably, the moving part 71 comprises 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 symmetrically arranged at the two ends of the mounting plate 711 and penetrate along the Y direction, and the two connecting shafts 713 extending out of the two ends of the mounting plate 711 are connected with the two guide plates 712 respectively;

[0068] The two guide plates 712 and the mounting plate 711 are left with gaps, the adjusting shaft 714 is provided with a bearing 715 on the shaft segment between the two gaps, and the outer ring of the bearing 715 is in rolling contact with the support beam.

[0069] The two guide plates 712 and the mounting plate 711 are left with gaps, the adjusting shaft 714 is provided with a bearing 715 on the shaft segment between the two gaps, and the outer ring of the bearing 715 is in rolling contact with the support beam.

[0070] As a preferred embodiment of the above embodiment, as shown in Figure 8 The adjusting shaft 714 comprises a middle shaft segment 714a and two eccentric shaft segments 714b; the two eccentric shaft segments 714b are symmetrically arranged at the two ends of the middle shaft segment 714a and are arranged eccentrically with the axis of the middle shaft segment 714a;

[0071] The bearing 715 is installed 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, forming a hexagonal driving shaft section 714c;

[0072] A through hole is arranged radially at the middle position of the middle shaft section 714a, and the mounting plate 711 is provided with a through hole corresponding to the through hole, and the limit pin 716 is embedded in the through hole and the through hole in alignment;

[0073] When the adjusting shaft 714 is rotated to the first position, the mounting plate 711 is lifted, and at this time the outer circle of the bearing 715 is in rolling contact with the support beam; and when the adjusting shaft 714 is rotated to the second position, the mounting plate 711 is in surface contact with the support beam, and the bearing 715 is not in contact with the support beam. It needs to be explained that the first position is rotated by 180° to reach the second position; and when the moving part 71 is movable, the adjusting shaft 714 is rotated to the first position, and when the moving part 71 is fixed, the adjusting shaft 714 is rotated to the second position.

[0074] 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 predetermined distance from the support beam, and the limit pin 716 passes through the through hole and the through hole to ensure the circumferential fixation of the adjusting shaft 714, 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 realized by means of the rolling friction characteristic; after the adjustment is completed, the adjusting shaft 714 is rotated by 180° to the second position, the mounting plate 711 is lowered, the bearing 715 is withdrawn into the gap between the guide plate 712 and the mounting plate 711, and the bottom surface of the mounting plate 711 is in close abutment with the support beam to realize rigid positioning, so as to avoid the displacement of the moving part 71 due to vibration during the weft laying operation, and the adjustment flexibility and positioning stability are considered.

[0075] In the preferred embodiment of the application, the first driving assembly 5 comprises a first servo motor, a first synchronous pulley set and a linear guide rail set; the weft laying trolley 2 is slidably arranged on the cross beam 1 through the linear guide rail set, and is fixed on one side of the transmission belt of the first synchronous pulley set through a connecting piece, and the first servo motor drives the weft laying trolley 2 to reciprocate along the Y direction through the first synchronous pulley set. The combination structure of the servo motor, the synchronous pulley set and the linear guide rail set guarantees the accuracy and stability of the movement of the weft laying trolley 2 in the Y direction, and meets the high-speed operation requirement of continuous weft laying.

[0076] In the preferred scheme of the application, the downward pressing driving assembly 24 comprises a second servo motor, a second synchronous pulley set, a first ball screw set and a wear-resistant plate 241, the wear-resistant plate 241 is connected below the screw rod of the first ball screw set through bolts, and forms a synchronous linkage structure with the screw rod;

[0077] The second servo motor drives the wear-resistant plate 241 to move up and down along the Z direction through the internal second synchronous pulley set and the first ball screw set, so as to realize the lifting action of the presser plate 23. During operation, the second servo motor can adjust the rotating speed according to the requirements, and accurately control the lifting speed and the stopping position of the wear-resistant plate 241. Through the accurate speed regulation and positioning control of the second servo motor, the lifting speed and the stopping position of the wear-resistant plate 241 can be flexibly adjusted according to different operation parameters such as the material of the yarn and the thickness of the fabric, so as to adapt to diversified weft laying requirements; at the same time, the action of the second servo motor is accurately linked with the action of the yarn receiving trolley 4 and the chain needle plate 3, and through the speed and position cooperation, the reliability of the yarn hanging and the yarn pressing is further improved.

[0078] On the basis of the above scheme, the third driving assembly 25 comprises a third servo motor, a second ball screw set, a mounting seat 251, an optical shaft 252 and a lifting plate 253, the optical shaft 252 penetrates through the two ends of the mounting seat 251 along the Z direction and is connected with the mounting bracket 26 and the lifting plate 253 respectively;

[0079] The lifting plate 253 is slidably arranged on the wear-resistant plate 241 along the X direction through the guide wheels assembled on the side wall of the lifting plate 253; the third servo motor drives the mounting seat 251 to move left and right along the X direction through the second ball screw set, so as to drive the mounting bracket 26 and the guide yarn device 22 and the presser plate 23 to move synchronously.

[0080] The third servo motor and the second ball screw set are matched to realize the accurate positioning and speed regulation of the mounting seat 251 along the X direction, the penetration connection of the optical shaft 252 along the Z direction can guarantee the perpendicularity and stability of the movement of the mounting bracket 26, and the lifting plate 253 is matched with the guide wheels to slide on the wear-resistant plate 241, which not only provides auxiliary guidance for the movement along the X direction, but also connects the lifting action of the downward pressing driving assembly 24, so as to accurately adapt to the position adjustment requirements of the guide yarn device 22 and the presser plate 23 along the X direction, and efficiently cooperate with the continuous weft laying and multi-angle weft laying functions of the whole device.

[0081] In the application, the second driving assembly 6 comprises a needle plate, a linear guide rail set, a third synchronous pulley set, a planetary reducer and a fourth servo motor; the needle plate is installed on the supporting beam through the linear guide rail set, the fourth servo motor is in transmission connection with the planetary reducer, the output end of the planetary reducer is linked with the third synchronous pulley set, and the power is transmitted through the fourth servo motor, the planetary reducer and the third synchronous pulley set in sequence to drive the needle plate to reciprocate along the linear guide rail set.

[0082] The fourth servo motor is matched with the planetary reducer to realize speed reduction, torque increase and accurate speed regulation, so as to meet the speed difference compensation requirements of the yarn receiving trolley 2 during the yarn receiving process; the third synchronous pulley set guarantees the power to be transmitted without slipping, and cooperates with the guiding action of the linear guide rail set to make the needle plate reciprocate stably without deviation, so as to accurately receive the yarn and complete the yarn hanging action with the weft laying trolley 2, and improve the connection reliability and stability of the continuous weft laying.

[0083] Embodiment two:

[0084] Based on the same inventive concept as the continuous weft laying device of the multi-axial warp knitting machine in the foregoing embodiment, the present application also provides a laying method of the continuous weft laying device of the multi-axial warp knitting machine, as shown in the figure, the laying method comprises: Figures 9-11

[0085] Yarn picking: start the first driving assembly 5 to drive the weft laying trolley 2 to move from left to right along the beam 1Y direction, and control the left side presser bar 23 of the weft laying trolley 2 to move upward along the Z direction by the downward driving assembly 24, so that the yarn is pulled to the yarn pulling inflection point position according to the preset yarn path;

[0086] Yarn hanging: when the weft laying trolley 2 moves to the yarn pulling inflection point position, the left side presser bar 23 is located in the middle area between the steel needle of the chain needle plate 3 and the W needle of the yarn picking trolley 4, and the left side presser bar 23 is driven downward along the Z direction by the downward driving assembly 24 to press together, so that the yarn in the preset yarn path is pressed into the needle groove of the steel needle, realizing the preliminary positioning of the yarn and the steel needle;

[0087] The left side presser bar 23 remains in the pressed state, and the weft laying trolley 2 and the yarn picking trolley 4 are driven to move along the X direction, i.e. the opposite direction of the chain movement; during the movement, the moving speed of the yarn picking trolley 4 is slightly faster than that of the weft laying trolley 2, so as to compensate the position deviation of the yarn through the speed difference, and make the yarn preliminarily hang on the chain needle plate 3; ensure that the yarn is closely and accurately hung on the chain needle plate 3, so as to achieve reliable yarn hanging effect;

[0088] Yarn pressing: after the yarn hanging is completed, the left side presser bar 23 of the weft laying trolley 2 is moved upward along the Z direction by the downward driving assembly 24, so that the weft laying trolley 2 is separated from the yarn picking trolley 4; then the weft laying trolley 2 is reversely moved from right to left along the Y direction by the first driving assembly 5, and after maintaining a preset safe distance from the yarn picking trolley 4, the right side presser bar 23 is driven downward along the Z direction by the downward driving assembly 24 to press together, so as to press the yarn hung on the chain needle plate 3 for the second time; ensure that the yarn is firmly and reliably hung, and prevent problems such as disconnection and looseness;

[0089] Reset and cyclic laying: when the yarn pressing action is synchronously performed, the yarn picking trolley 4 returns to the starting position along the preset track to reset and wait for the next yarn picking; after the yarn pressing is completed, the weft laying trolley 2 moves to the other end of the laying area along the Y direction by the first driving assembly 5, and the above-mentioned yarn picking, yarn hanging and yarn pressing steps are repeated, so as to enter the next cycle of yarn laying and realize the continuous weft laying operation.

[0090] ​The yarn receiving stage relies on the first driving assembly 5 to realize the movement of the weft laying trolley 2Y in the direction, and the yarn pressing plate 23Z direction is realized by the downward driving assembly 24; the yarn hanging stage realizes the speed difference compensation through the third driving assembly 25 linkage weft laying trolley 2 in the X direction, and cooperates with the precise speed regulation structure of the yarn receiving trolley 4 to realize the speed difference compensation; the yarn pressing stage realizes the secondary compaction by using the independent action design of the double-sided yarn pressing plate 23, and the whole process avoids the yarn cutting and idle return link of the traditional process. Through the above-mentioned steps of coordinated linkage and cyclic operation, the weft laying device can realize the accurate and efficient continuous laying of the yarn, and ensure the stability and consistency of the yarn laying.

[0091] As a preferred scheme, the yarn pressing plate 23 of the weft laying trolley 2 is higher than the highest point of the chain needle plate 3 and the W needle of the yarn receiving trolley 4 in the Z direction during the yarn receiving, so as to prevent the yarn pressing plate 23 from interfering with the collision of the steel needle;

[0092] The downward pressing distance of the left yarn pressing plate 23 in the Z direction is smaller than that of the right yarn pressing plate 23 during the yarn hanging, and the yarn only needs to be preliminarily positioned, and the short distance pressing can avoid damaging the yarn, and the yarn pressing needs to be pressed twice to prevent the buckle, and the long distance pressing can ensure that the yarn is fixed firmly.

[0093] The above-mentioned laying method in the application can be effectively applied to the continuous weft laying device of the multi-axial warp knitting machine, and the technical effects are as described in the above-mentioned embodiment, which will not be repeated here.

[0094] Although the present application is described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present application. Accordingly, the specification and drawings are merely illustrative of the exemplary description of the present application, and are considered to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the present application and its equivalents, the present application intends to include these modifications and variations.

Claims

1. A continuous weft laying device for a multi-axial warp knitting machine, characterized in that, The invention relates to a warp knitting machine, comprising: a cross beam arranged in the width direction of the warp knitting machine, a weft laying carriage slidingly arranged on the cross beam, and a yarn locking assembly arranged at the two pull points of the warp knitting machine; the weft laying carriage is provided with a first driving assembly, and the weft laying carriage can be reciprocally arranged on the cross beam in the Y direction through the first driving assembly; the weft laying carriage comprises a carriage body, a yarn guide, a presser plate, a pressing driving assembly and a third driving assembly, the yarn guide and the presser plate are arranged on the carriage body through a mounting bracket, the pressing driving assembly drives the yarn guide and the presser plate to move up and down in the Z direction through driving the mounting bracket, and the third driving assembly drives the yarn guide and the presser plate to move in the X direction through driving the mounting bracket; the yarn locking assembly comprises a chain needle plate and a yarn receiving carriage, the chain needle plate can move in the X direction through a chain assembly, and the yarn receiving carriage is provided with a second driving assembly, and the yarn receiving carriage can be slidingly arranged on the support beam of the warp knitting machine in the X direction through the second driving assembly; the invention further comprises an angle adjusting assembly arranged at the two ends of the cross beam; the angle adjusting assembly comprises a moving part and a supporting part; the top of the supporting part is fixedly connected below the end of the cross beam, and the bottom of the supporting part is rotatably arranged on the moving part through a rotating disc; the moving part drives the supporting part to synchronously move in the X direction, and cooperates with the rotation of the supporting part below the cross beam to change the weft laying angle of the cross beam in the width direction; the moving part comprises a mounting plate, two guide plates, two connecting shafts and two adjusting shafts; the two connecting shafts and the two adjusting shafts are respectively and symmetrically arranged at the two ends of the mounting plate and penetrate in the Y direction, and the two connecting shafts respectively connect the two guide plates by extending out of the two ends of the mounting plate; gaps are left between the two guide plates and the mounting plate, bearings are arranged on the shaft segments of the two gaps, and the outer rings of the bearings are in rolling contact with the support beam; the adjusting shaft comprises a middle shaft segment and two eccentric shaft segments, the two eccentric shaft segments are symmetrically arranged at the two ends of the middle shaft segment and are eccentrically arranged with the axis of the middle shaft segment; the bearings are arranged on the eccentric shaft segments, the two ends of the eccentric shaft segments extend outward and penetrate the two guide plates, and a hexagonal driving shaft segment is formed; a penetrating hole is arranged in the middle of the middle shaft segment in the radial direction, a through hole is arranged in the mounting plate corresponding to the penetrating hole, and a limiting pin is embedded in the penetrating hole when the penetrating hole is aligned with the through hole; when the adjusting shaft is rotated to a first position, the mounting plate is lifted, at this time, the outer circle of the bearing is in rolling contact with the support beam, and when the adjusting shaft is rotated to a second position, the mounting plate is in surface contact with the support beam, and the bearing is not in contact with the support beam.

2. The multi-axial warp knitting machine continuous laying weft device according to claim 1, characterized in that, the first driving assembly comprises a first servo motor, a first synchronous pulley set and a linear guide rail set; the weft laying carriage is slidingly arranged on the cross beam through the linear guide rail set, and is fixed on one side of the transmission belt of the first synchronous pulley set through a connecting piece, and the first servo motor drives the weft laying carriage to reciprocally move in the Y direction through the first synchronous pulley set.

3. The multi-axial warp knitting machine continuous laying weft device according to claim 1, characterized in that, The lower pressing driving assembly comprises a second servo motor, a second synchronous pulley set, a first ball screw set and a wear-resistant plate, the wear-resistant plate is connected below the screw rod of the first ball screw set by bolts, and a synchronous linkage structure is formed with the screw rod; The second servo motor is transmission matched with the second synchronous pulley set and the first ball screw set to drive the wear-resistant plate to move up and down along the Z direction, so as to realize the lifting action of the pressing plate.

4. The multi-axial warp knitting machine continuous laying weft device according to claim 3, characterized in that, The third driving assembly comprises a third servo motor, a second ball screw set, a mounting seat, an optical shaft and a lifting plate, the optical shaft penetrates through the two ends of the mounting seat along the Z direction and is respectively connected with the mounting bracket and the lifting plate; The lifting plate is provided on the wear-resistant plate along the X direction through the guide wheels assembled on the side wall of the lifting plate; The third servo motor is transmission matched with the second ball screw set to drive the mounting seat to move left and right along the X direction, and then the mounting bracket and the guide are synchronously moved.

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

6. A method of laying a plurality of weft threads in a continuous laying device of a multi-axial warp knitting machine according to any one of claims 1 to 5, characterized in that, Comprise: Yarn: start the first driving assembly to drive the weft laying car to move from left to right along the cross beam Y direction, and control the pressing plate of the weft laying car to move up along the Z direction through the lower pressing driving assembly, so that the yarn is pulled to the yarn pulling inflection point position according to the preset yarn path; Hanging yarn: when the weft laying car moves to the yarn pulling inflection point position, the left pressing plate is located in the middle area between the steel needle of the chain needle plate and the W needle of the yarn picking car, the left pressing plate is driven downward by the lower pressing driving assembly, the yarn in the preset yarn path is pressed into the needle groove of the steel needle, and the preliminary positioning of the yarn and the steel needle is realized; the left pressing plate remains in the pressing state, and the weft laying car and the yarn picking car are synchronously driven to move along the X direction, that is, the opposite direction of the chain movement; during the movement, the moving speed of the yarn picking car is slightly faster than that of the weft laying car, the position deviation of the yarn is compensated through the speed difference, and the yarn is preliminarily hung on the chain needle plate; Yarn pressing: after the yarn hanging is completed, the left pressing plate of the weft laying car is moved upward along the Z direction through the lower pressing driving assembly, so that the weft laying car and the yarn picking car are separated; then the weft laying car is reversely moved from right to left along the Y direction through the first driving assembly, and after keeping a preset safety distance from the yarn picking car, the right pressing plate is driven downward along the Z direction through the lower pressing driving assembly to press the yarn hung on the chain needle plate again. ​ Reset and cycle laying: when the pressing action is synchronized, the yarn receiving trolley returns to the starting position along the preset track to reset and prepare for the next round of yarn receiving; after the pressing is completed, the weft laying trolley moves to the other end of the laying area along the Y direction through the first driving assembly, and the above-mentioned yarn receiving, yarn hanging and pressing steps are repeated to enter the next round of yarn laying cycle, realizing continuous weft laying operation.

7. The laying method of the continuous laying weft device of the multi-axial warp knitting machine according to claim 6, characterized in that, When receiving yarn, the pressing plate of the weft laying trolley moves in the Z direction to a height higher than the highest point of the chain needle plate and the W needle of the yarn receiving trolley; When hanging yarn, the downward movement pressing distance of the left pressing plate in the Z direction is less than that of the right pressing plate.

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