An automatic yarn pressing device for composite material grid production

Abstract

The present invention discloses an automatic yarn pressing device for producing composite material grids, comprising a forming mold, a grid forming area provided on the top surface of the forming mold, a plurality of evenly distributed modules provided within the grid forming area, grid forming grooves formed between adjacent modules and between the modules and the frame of the grid forming area, a warp travel mechanism provided on the forming mold, the travel area of the warp travel mechanism covering the grid forming area, a pneumatic yarn pressing mechanism provided on the forming mold via the warp travel mechanism, the pneumatic yarn pressing mechanism moving along the warp direction above the forming mold, and performing yarn pressing operations in the grid forming area of the forming mold. The present invention can maintain a uniform and consistent process and force for yarn pressing, thereby ensuring process control of yarn pressing, reducing labor intensity of workers, and improving production efficiency.

Description

Technical Field

[0001] The invention belongs to the field of composite material grid production, in particular to an automatic yarn pressing device for composite material grid production. Background Art

[0002] Composite material grille is a widely used material. Glass fiber yarns need to be evenly laid in composite material grille. At present, when producing grille products, yarn laying and pressing are generally done manually. Manually pressing yarns is labor-intensive, and has low production efficiency and high production costs. At the same time, when manually pressing yarns, the process and strength of pressing yarns cannot be effectively and consistently controlled, making it difficult to control the quality of the product's pressing yarns well. For this reason, an automatic yarn pressing device for composite material grille production is designed to replace manual yarn pressing and manufacture composite material grilles in line with the needs of the times. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide an automatic yarn pressing device for composite grating production, replacing manual yarn pressing for composite grating production. Compared with manual yarn pressing, this device can maintain a uniform yarn pressing process and force, ensuring control of the yarn pressing process. It also reduces worker labor intensity and improves production efficiency.

[0004] The objectives of the present invention are achieved through the following technical solutions: an automatic yarn pressing device for producing composite material grilles, comprising a forming mold, a grille forming area is provided on the top surface of the forming mold, a number of evenly distributed modules are provided in the grille forming area, grille forming grooves are formed between adjacent modules and between the modules and the frame of the grille forming area, a warp walking mechanism is provided on the forming mold, the walking area of the warp walking mechanism covers the grille forming area, a pneumatic yarn pressing mechanism is provided on the forming mold through the warp walking mechanism, the pneumatic yarn pressing mechanism moves along its warp above the forming mold, and the pneumatic yarn pressing mechanism performs yarn pressing operations in the grille forming area of the forming mold.

[0005] A further technical solution is that the warp travel mechanism includes a warp travel power slide, a warp travel slide, a warp linear guide, a linear slider, a warp rack, a warp motor, a transmission gear and a drag chain for protecting the movement of electrical and pneumatic wiring harnesses. The warp linear guides are provided on both side edges of the forming mold, and the linear sliders are movably provided on the warp linear guides. The warp travel power slide and the warp travel slide are respectively arranged on two linear sliders. The warp rack is arranged on one side of the forming mold and corresponds to the warp linear guide where the warp travel power slide is located. The warp motor is installed on the warp travel power slide, and its output end passes through the warp travel power slide and is connected to the transmission gear. The transmission gear is located on one side of the warp rack and is meshed with the warp rack. The drag chain is arranged below the warp travel power slide through a connecting plate.

[0006] A further technical solution is that the pneumatic yarn pressing mechanism is arranged between the warp travel power slide and the warp travel slide, the pneumatic yarn pressing mechanism includes a pneumatic actuator unit, a knife pressing unit and a flexible guide column for connecting the pneumatic actuator unit and the knife pressing unit, the pneumatic actuator unit includes a pneumatic guide bracket, a synchronous actuator cylinder, a pneumatic pressure crossbeam and a support column, the pneumatic guide bracket spans the grid forming area of the forming mold in the weft direction, and its two ends are fixedly connected to the warp travel power slide and the warp travel slide through the support column, there are two synchronous actuator cylinders, the two synchronous actuator cylinders are respectively installed on the side plates at both ends of the pneumatic guide bracket, and the output shaft of the synchronous actuator cylinder is facing to the side away from the support column, the pneumatic pressure crossbeam is located above the pneumatic guide bracket, and its two ends are respectively fixedly connected to the output shafts of the two synchronous actuator cylinders.

[0007] A further technical solution is that the pneumatic pressure cross arm is provided with two longitudinal pressure strips, the flexible guide column is arranged on the pressure strip and is respectively located on both sides of the pneumatic pressure cross arm, the flexible guide column includes a flexible cavity sleeve, a first compression spring, a guide column, a linear bearing and a guide shaft support, the flexible cavity sleeve is hollow, and a pressure strip slide groove adapted to the pressure strip is opened on the side of its cavity, the pressure strip end of the pneumatic pressure cross arm is inserted into the pressure strip slide groove corresponding to the flexible cavity sleeve, the first compression spring is arranged in the flexible cavity sleeve, and its end close to the bottom of the flexible cavity sleeve contacts with the pressure strip, one end of the guide column is inserted into the flexible cavity sleeve and fixedly connected with the flexible cavity sleeve, the end of the first compression spring away from the pressure strip contacts with the guide column, a reinforcement plate is installed on the pneumatic guide bracket, the reinforcement plate is located directly below the pressure strip, and a through-hole adapted to the guide column is opened on the reinforcement plate, the linear bearing is mounted on the reinforcement plate through a mounting seat and communicates with the through-hole, and one end of the guide column away from the first compression spring passes through the linear bearing and the through-hole and is fixedly connected to the guide shaft support.

[0008] A further technical solution is that the knife pressing unit is located between the forming mold and the pneumatic guide bracket, and the knife pressing unit includes a knife pressing frame body, a knife pressing base plate, a middle knife pressing and a side knife mechanism. The knife pressing frame body is fixed on the knife pressing base plate, and the guide shaft support is fixedly connected to the side of the knife pressing frame body away from the knife pressing base plate. The side knife mechanism is provided with two groups, and the two groups of side knife mechanisms and the middle knife pressing are both provided on the knife pressing base plate. The two groups of side knife mechanisms are respectively located at both ends of the knife pressing base plate, and there are multiple middle knife pressing knives. The multiple middle knife pressing knives are all installed on the side of the knife pressing base plate away from the knife pressing frame body, and are all located between the two groups of side knife mechanisms.

[0009] A further technical solution is that the edge knife mechanism includes an automatic reset hinged knife holder, a second compression spring, a first sliding sleeve, a second sliding sleeve, a second sliding sleeve bracket, a spring compression rod, an edge knife, a trigger block and a push rod, and the automatic reset hinged knife holder includes a hinge fixed end, a hinge movable end knife holder and a third compression spring;

[0010] The hinge fixing end of the automatic reset hinged tool holder and the second slide bracket are both fixed to the knife pressing base plate, the second slide bracket is located on one side of the hinge fixing end, a mounting seat hole is opened on the knife pressing base plate, the mounting seat hole corresponds to the second slide bracket, the first slide is inserted into the mounting seat hole and fixed to the knife pressing base plate, the push rod passes through the first slide sleeve and is connected to the spring compression rod, the second slide sleeve is arranged at the top end of the second slide sleeve bracket and corresponds to the first slide sleeve, one end of the spring compression rod away from the push rod is passed through the second slide sleeve, the second compression spring is sleeved on the spring compression rod, one end of which is connected to the bottom shaft shoulder of the spring compression rod, and the other end is connected to the second slide sleeve to form a flexible compression sleeve;

[0011] The third compression spring is arranged between the fixed end of the hinge and the horizontal plate of the tool holder at the movable end of the hinge. A mechanical trigger slide is provided on the upper part of the tool holder at the movable end of the hinge. The trigger block is installed at the end of the spring compression rod close to the top rod, and the side knife is installed at the bottom of the horizontal plate of the tool holder at the movable end of the hinge.

[0012] A further technical solution is that the plurality of middle pressing knives and the side knives are distributed at equal intervals, and their length directions are all meridian, respectively corresponding to the meridian grid forming grooves evenly distributed in the forming mold.

[0013] A further technical solution is that guide rail protective covers for protecting the warp linear guide rails are installed on both sides of the forming mold. The cross-section of the guide rail protective cover is a broken line shape, one side of which is fixedly connected to the side end of the forming mold, and the other side extends to the warp linear guide rails, the warp travel power slide and above the warp travel slide.

[0014] The present invention has the following advantages:

[0015] (1) The grid forming area is used to place semi-finished products to be pressed. The pneumatic pressing mechanism can press the semi-finished products. The warp travel mechanism can drive the pneumatic pressing mechanism to pass over the grid forming area, thereby pressing the semi-finished products placed in the entire grid forming area. The pneumatic pressing mechanism can replace manual pressing, which can reduce labor intensity, reduce the production cost of pressing, and better ensure the product quality of pressed products.

[0016] (2) When the warp motor is running, it can move along the warp direction of the forming mold through the transmission gear, and then drive the warp power slide and the warp travel slide to move in the warp direction. When the warp power slide and the warp travel slide move, they can drive the pneumatic guide bracket to move, and then drive the knife holder to move along the warp direction of the forming mold, and then drive the middle knife and the side knife to move. The synchronous execution of the cylinder action can drive the pneumatic pressure cross arm to approach the forming mold, and then press the knife holder body through the guide column and the guide shaft support, so that the side knife mechanism and the middle knife are pressed toward the forming mold. Under the action of the first telescopic spring, the entire downward pressing process is relatively slow, avoiding the semi-finished product located in the grid forming area from being crushed due to the excessive output of the synchronous execution cylinder;

[0017] (3) When the bottom end of the top rod of the edge knife mechanism touches the forming mold, the trigger block can trigger the trigger slide on the hinge movable end tool holder, and the automatic reset hinged tool holder can perform hinged movement according to the inclination angle of the trigger slide. At the same time, the second compression spring and the third compression spring are compressed. During the compression or release process of the second compression spring and the third compression spring, the edge knife will swing with the movement of the automatic reset hinged tool holder. The swinging edge knife can press the semi-finished product at the grid groove near the edge line on the forming mold. In conjunction with the middle pressing knife and the warp walking mechanism, the semi-finished product in the grid forming area can be pressed in the grid forming groove area without dead angles and effectively and controllably. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0020] Figure 3 It is a structural diagram of the pneumatic actuator;

[0021] Figure 4 It is a structural diagram of the knife pressing unit;

[0022] Figure 5 Schematic diagram of the cross-sectional structure of the flexible guide column;

[0023] Figure 6It is a structural diagram of the edge knife mechanism.

[0024] In the figure, 1. forming die; 11. grid forming area; 2. warp travel mechanism; 21. warp travel power slide; 23. warp linear guide rail; 24. linear slide; 25. warp rack; 26. warp motor; 27. transmission gear; 28. drag chain; 12. warp mounting plate; 13. guide rail protective cover; 3. pneumatic yarn pressing mechanism; 4. pneumatic actuator; 5. knife pressing unit; 6. flexible guide column; 41. pneumatic guide bracket; 42. synchronous actuator cylinder; 43. pneumatic pressure cross arm; 44. support column; 45. pressure strip; 411. reinforcement plate; 6 1. Flexible cavity sleeve; 62. First compression spring; 63. Guide column; 64. Linear bearing; 65. Guide shaft support; 51. Knife pressing frame body; 52. Knife pressing base plate; 53. Middle knife pressing; 7. Side knife mechanism; 71. Automatic reset hinged knife holder; 72. Second compression spring; 73. First slide; 74. Second slide; 75. Second slide bracket; 76. Spring compression rod; 77. Side knife; 78. Trigger block; 79. Push rod; 711. Hinge fixed end; 712. Hinge movable end knife holder; 713. Third compression spring; 714. Trigger slide. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] like Figures 1 to 6 As shown, an automatic yarn pressing device for composite material grid production includes a forming mold 1, the top surface of which is provided with a grid forming area 11. A plurality of evenly distributed modules are arranged within the grid forming area 11. Grille forming grooves are formed between adjacent modules and between the modules and the frame of the grid forming area 11. A warp travel mechanism 2 is provided on the forming mold 1, and the travel area of the warp travel mechanism 2 covers the grid forming area 11.

[0032] The warp travel mechanism 2 includes a warp travel power slide 21, a warp travel slide (not shown), warp linear guides 23, linear sliders 24, a warp rack 25, a warp motor 26, a transmission gear 27, and a drag chain 28 to protect the electrical and pneumatic wiring harnesses. Two warp linear guides 23 are provided, mounted on either side of the top edge of the forming mold 1 via a warp mounting plate 12. Two linear sliders 24 are provided, each compatible with one of the two warp linear guides 23 and movably mounted on its corresponding warp linear guide 23.

[0033] The warp travel power slide 21 and the warp travel slide are respectively mounted on two linear sliders 24. The warp rack 25 is mounted on one side of the forming mold 1 via the warp mounting plate 12 and corresponds to the warp linear guide 23 where the warp travel power slide 21 is located. The warp rack 25 is located on the side of the warp linear guide 23 away from the forming mold 1. The warp motor 26 is a servo motor for easy control. The warp motor 26 is mounted on the warp travel power slide 21. Its output end passes through the warp travel power slide 21 and extends to the area where the teeth of the warp rack 25 are facing. The transmission gear 27 is mounted on the output shaft of the warp motor 26. The transmission gear 27 is located below the warp travel power slide 21 and meshes with the warp rack 25. The drag chain 28 is set below the warp travel power slide 21 via a connecting plate. When the warp travel power slide 21 moves, the drag chain 28 moves with it.

[0034] Guide rail guards 13 for protecting the warp linear guide rails 23 are installed on both sides of the forming mold 1. The cross-section of the guide rail guard 13 is a broken line shape, one side of which is fixedly connected to the side end of the forming mold 1, and the other side extends to the warp linear guide rails 23, the warp travel power slide 21 and above the warp travel slide.

[0035] The forming mold 1 is provided with a pneumatic yarn pressing mechanism 3 capable of performing yarn pressing operation in the grid forming area 11 of the forming mold 1 through the warp traveling mechanism 2. The pneumatic yarn pressing mechanism 3 is arranged between the warp traveling power slide 21 and the warp traveling slide.

[0036] The pneumatic yarn pressing mechanism 3 includes a pneumatic actuator unit 4, a knife pressing unit 5 and a flexible guide column 6 for connecting the pneumatic actuator unit 4 and the knife pressing unit 5. The pneumatic actuator unit 4 includes a pneumatic guide bracket 41, a synchronous actuator cylinder 42, a pneumatic pressure cross arm 43 and a support column 44. The pneumatic guide bracket 41 spans the grid forming area 11 of the forming mold 1 in the weft direction, and its two ends are fixedly connected to the warp travel power slide 21 and the warp travel slide through the support column 44. There are two synchronous actuator cylinders 42, and the two synchronous actuator cylinders 42 are respectively installed on the side plates at both ends of the pneumatic guide bracket 41, and the output shaft of the synchronous actuator cylinder 42 is facing away from the support column 44. The pneumatic pressure cross arm 43 is located above the pneumatic guide bracket 41, and its two ends are respectively fixedly connected to the output shafts of the two synchronous actuator cylinders 42.

[0037] The pneumatic pressure crossarm 43 is provided with two longitudinal pressure strips 45, and flexible guide posts 6 are arranged on the pressure strips 45. There are two flexible guide posts 6 on each pressure strip 45, and the two flexible guide posts 6 are located on either side of the pneumatic pressure crossarm 43 on the corresponding pressure strip 45. The flexible guide posts 6 include a flexible cavity sleeve 61, a first compression spring 62, a guide post 63, a linear bearing 64, and a guide shaft support 65. The flexible cavity sleeve 61 is hollow, and its cavity side is provided with a pressure strip 45 slot that matches the pressure strip 45. The end of the pressure strip 45 of the pneumatic pressure crossarm 43 is inserted into the corresponding pressure strip 45 slot of the flexible cavity sleeve 61. The first compression spring 62 is arranged in the flexible cavity sleeve 61, and its end near the bottom of the flexible cavity sleeve 61 contacts the pressure strip 45. One end of the guide post 63 is inserted into the flexible cavity sleeve 61 and fixedly connected to the flexible cavity sleeve 61. The end of the first compression spring 62 away from the pressure strip 45 contacts the end of the guide post 63 inserted into the flexible cavity sleeve 61. A reinforcement plate 411 is mounted on the pneumatic guide bracket 41. The reinforcement plate 411 is located directly below the pressure strip 45 and has a through-hole that matches the guide post 63. The linear bearing 64 is mounted on the reinforcement plate 411 via a mounting seat and communicates with the through-hole. The end of the guide post 63 away from the first compression spring 62 passes through the linear bearing 64 and the through-hole and is fixedly connected to the guide shaft support 65.

[0038] The blade pressing unit 5 is located between the forming mold 1 and the pneumatic guide bracket 41. It comprises a blade pressing frame 51, a blade pressing base 52, a central blade pressing 53, and a side blade mechanism 7. The blade pressing frame 51 is fixed to the blade pressing base 52, and the guide shaft support 65 is fixedly connected to the side of the blade pressing frame 51 away from the blade pressing base 52. Two sets of side blade mechanisms 7 are provided, and both sets of side blade mechanisms 7 and the central blade pressing 53 are disposed on the blade pressing base 52. The two sets of side blade mechanisms 7 are located at either end of the blade pressing base 52, and multiple central blade pressing 53 are provided. Each of the multiple central blade pressing 53 is mounted on the side of the blade pressing base 52 away from the blade pressing frame 51 and is located between the two sets of side blade mechanisms 7.

[0039] The edge cutter mechanism 7 includes an automatic reset hinged cutter holder 71, a second compression spring 72, a first sleeve 73, a second sleeve 74, a second sleeve bracket 75, a spring compression rod 76, an edge cutter 77, a trigger block 78, and a push rod 79. The automatic reset hinged cutter holder 71 includes a hinge fixed end 711, a hinge movable end cutter holder 712, and a third compression spring 713. The hinge fixed end 711 and the second sleeve bracket 75 of the automatic reset hinged cutter holder 71 are both fixed to the press plate 52, with the second sleeve bracket 75 located to one side of the hinge fixed end 711. A mounting hole is defined in the press plate 52, corresponding to the second sleeve bracket 75. The first sleeve 73 is inserted into the mounting hole and secured to the press plate 52. The push rod 79 passes through the first sleeve 73 and is connected to the spring compression rod 76. The second sleeve 74 is disposed at the top of the second sleeve bracket 75 and corresponds to the first sleeve 73. One end of the spring compression rod 76 away from the push rod 79 is inserted into the second sliding sleeve 74. The second compression spring 72 is sleeved on the spring compression rod 76, one end of which is connected to the bottom shoulder of the spring compression rod 76 and the other end is connected to the second sliding sleeve 74 to form a flexible compression sleeve.

[0040] The third compression spring 713 is installed between the hinge fixed end 711 and the horizontal plate of the hinge movable end tool holder 712. A mechanical trigger slide 714 adapted to the trigger block 78 is provided on the upper portion of the hinge movable end tool holder 712. The trigger block 78 is installed at the end of the spring compression rod 76 near the top rod 79. The side knife 77 is installed at the bottom of the horizontal plate of the hinge movable end tool holder 712. When the second compression spring 72 and the third compression spring 713 are compressed and released, the side knife 77 can swing with the movement of the automatic reset hinged tool holder 71. At the same time, the side knife 77 can organically cooperate with the hinge movable end tool holder 712 of the automatic reset hinged tool holder 71 through the trigger block 78. The side knife 77 can fit the side pressing yarn at the edge of the panel of the molding mold 1.

[0041] The plurality of middle pressing knives 53 and side knives 77 are distributed at equal intervals, and their length directions are all in the meridian direction, corresponding to the meridian grid forming grooves evenly distributed in the forming mold 1 .

[0042] The implementation principle of the present invention is as follows: when the present invention is performing the work of pressing the semi-finished product yarn, the staff controls the synchronous execution cylinder 42 to run, so that it drives the pneumatic pressure cross arm 43 to approach the forming mold 1, and then can drive the pressing unit 5 to approach the forming mold 1 through the flexible guide column 6, so that the middle pressing knife 53 and the side knife mechanism 7 on the pressing unit 5 are pressed toward the forming mold 1, so that the middle pressing knife 53 and the side knife 77 can act on the pressed semi-finished yarn surface, and then by controlling the operation of the warp motor 26, the warp walking power slide 21 and the warp walking slide are moved on the corresponding warp linear guide rail 23, so that the pneumatic guide bracket 41 can be moved, and then the pressing unit 5 can perform the yarn pressing operation on the semi-finished yarn surface on the grid forming area 11.

[0043] The present invention uses a series of linkages of the pneumatic guide bracket 41-synchronous execution cylinder 42-pneumatic pressure cross arm 43-flexible guide column 6-pressing knife unit 5, so that the pressing knife unit 5 can act on the surface of the semi-finished yarn that needs to be pressed. By controlling the action and frequency of the synchronous execution cylinder 42, a flexible, pressure-consistent, controllable, and vibrating yarn pressing process can be achieved. Specifically, in the edge knife mechanism 7, when the lower end of its push rod 79 touches the top of the module near the edge line in the forming mold 1, the second compression spring 72 and the third compression spring 713 are compressed, and the trigger block 78 triggers the trigger slide 714 on the hinged movable end knife holder 712, and the automatically reset hinged knife holder 71 performs hinged movement according to the inclination angle of the trigger slide 714;

[0044] When the second compression spring 72 and the third compression spring 713 are compressed and released, the side knife 77 can swing along with the movement of the automatic reset hinged knife holder 71. The side knife 77 cooperates with the automatic reset hinged knife holder 71 through the trigger block 78, so that the side knife 77 can fit the edge module of the forming mold 1, thereby achieving side yarn pressing of the semi-finished product on the forming module.

[0045] The present invention realizes effective, controllable and dead angle-free automatic yarn pressing relative to the grid forming area 11 of the forming mold 1 by controlling the position of the warp traveling mechanism 2 relative to the grid forming area 11 of the forming mold 1 and controlling the pressure and frequency of the pneumatic yarn pressing mechanism 3.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic yarn pressing device for producing composite material grids, comprising a forming die (1), characterized in that: The top surface of the forming mold (1) is provided with a grid forming area (11), a plurality of evenly distributed modules are provided in the grid forming area (11), grid forming grooves are formed between adjacent modules and between the modules and the frame of the grid forming area (11), the forming mold (1) is provided with a warp walking mechanism (2), the walking area of the warp walking mechanism (2) covers the grid forming area (11), and the forming mold (1) is provided with a pneumatic yarn pressing mechanism (3) through the warp walking mechanism (2), the pneumatic yarn pressing mechanism (3) moves above the forming mold (1) along its warp direction, and the pneumatic yarn pressing mechanism (3) performs yarn pressing operation in the grid forming area (11) of the forming mold (1); The pneumatic yarn pressing mechanism (3) comprises a pneumatic actuator unit (4), a knife pressing unit (5), and a flexible guide column (6) for connecting the pneumatic actuator unit (4) and the knife pressing unit (5); The pneumatic actuator unit (4) includes a pneumatic guide bracket (41), a synchronous actuator cylinder (42), a pneumatic pressure cross arm (43) and a support column (44); The pneumatic pressure cross arm (43) is provided with two longitudinal pressure strips (45), and the flexible guide column (6) is provided on the pressure strip (45) and is respectively located on both sides of the pneumatic pressure cross arm (43). The flexible guide column (6) includes a flexible cavity sleeve (61), a first compression spring (62), a guide column (63), a linear bearing (64) and a guide shaft support (65). The flexible cavity sleeve (61) is hollow, and a pressure strip (45) slide groove adapted to the pressure strip (45) is provided on the side of its cavity. The end of the pressure strip (45) of the pneumatic pressure cross arm (43) is inserted into the pressure strip (45) slide groove corresponding to the flexible cavity sleeve (61). The first compression spring (62) is provided in the flexible cavity sleeve (61) and is close to the flexible cavity sleeve (61). One end of the cavity bottom of the cavity sleeve (61) contacts the pressure strip (45), one end of the guide column (63) is inserted into the flexible cavity sleeve (61) and fixedly connected to the flexible cavity sleeve (61), one end of the first compression spring (62) away from the pressure strip (45) contacts the guide column (63), a reinforcing plate (411) is installed on the pneumatic guide bracket (41), the reinforcing plate (411) is located just below the pressure strip (45), a through hole adapted to the guide column (63) is provided on the reinforcing plate (411), a linear bearing (64) is installed on the reinforcing plate (411) through a mounting seat and communicates with the through hole, and one end of the guide column (63) away from the first compression spring (62) passes through the linear bearing (64) and the through hole and is fixedly connected to the guide shaft support (65).

2. The automatic yarn pressing device for composite material grid production according to claim 1, characterized in that: The warp travel mechanism (2) comprises a warp travel power slide (21), a warp travel slide, a warp linear guide rail (23), a linear slider (24), a warp rack (25), a warp motor (26), a transmission gear (27) and a drag chain (28) for protecting the movement of the electrical and pneumatic harnesses. The warp linear guide rails (23) are provided at both side edges of the forming mold (1). The linear sliders (24) are movably provided on the warp linear guide rails (23). The warp travel power slide (21) and the warp travel slide are respectively provided at On the two linear sliders (24), a warp rack (25) is arranged on one side of the forming mold (1) and corresponds to the warp linear guide rail (23) where the warp travel power slide (21) is located. A warp motor (26) is installed on the warp travel power slide (21), and its output end passes through the warp travel power slide (21) and is connected to the transmission gear (27). The transmission gear (27) is located on one side of the warp rack (25) and is meshed with the warp rack (25). A drag chain (28) is arranged below the warp travel power slide (21) through a connecting plate.

3. The automatic yarn pressing device for composite material grid production according to claim 2, characterized in that: The pneumatic yarn pressing mechanism (3) is arranged between the warp travel power slide (21) and the warp travel slide; the pneumatic guide bracket (41) spans the grid forming area (11) of the forming mold (1) in the weft direction; and its two ends are fixedly connected to the warp travel power slide (21) and the warp travel slide respectively through the support column (44); two synchronous execution cylinders (42) are provided, and the two synchronous execution cylinders (42) are respectively mounted on the side plates at both ends of the pneumatic guide bracket (41), and the output shaft of the synchronous execution cylinder (42) is oriented to the side away from the support column (44); the pneumatic pressure cross arm (43) is located above the pneumatic guide bracket (41), and its two ends are fixedly connected to the output shafts of the two synchronous execution cylinders (42).

4. The automatic yarn pressing device for composite material grid production according to claim 1, characterized in that: The knife pressing unit (5) is located between the forming mold (1) and the pneumatic guide bracket (41). The knife pressing unit (5) comprises a knife pressing frame body (51), a knife pressing base plate (52), a middle knife pressing blade (53) and a side knife mechanism (7). The knife pressing frame body (51) is fixed on the knife pressing base plate (52). The guide shaft support (65) is fixedly connected to the side of the knife pressing frame body (51) away from the knife pressing base plate (52). The side knife mechanism (7) is provided with two groups. The two groups of side knife mechanisms (7) and the middle knife pressing blade (53) are both provided on the knife pressing base plate (52). The two groups of side knife mechanisms (7) are respectively located at two ends of the knife pressing base plate (52). A plurality of middle knife pressing blades (53) are provided. The plurality of middle knife pressing blades (53) are all installed on the side of the knife pressing base plate (52) away from the knife pressing frame body (51) and are all located between the two groups of side knife mechanisms (7).

5. The automatic yarn pressing device for composite material grid production according to claim 4, characterized in that: The edge knife mechanism (7) comprises an automatic reset hinged knife holder (71), a second compression spring (72), a first sliding sleeve (73), a second sliding sleeve (74), a second sliding sleeve bracket (75), a spring compression rod (76), an edge knife (77), a trigger block (78) and a push rod (79); the automatic reset hinged knife holder (71) comprises a hinge fixed end (711), a hinge movable end knife holder (712) and a third compression spring (713); The hinge fixing end (711) and the second sleeve bracket (75) of the automatic reset hinged tool holder (71) are both fixed on the knife pressing base plate (52). The second sleeve bracket (75) is located on one side of the hinge fixing end (711). A mounting seat hole is provided on the knife pressing base plate (52). The mounting seat hole corresponds to the second sleeve bracket (75). The first sleeve (73) is inserted into the mounting seat hole and fixed on the knife pressing base plate (52). The push rod (79) passes through the first sleeve (73 ), connected to the spring compression rod (76), the second sliding sleeve (74) is arranged at the top end of the second sliding sleeve bracket (75) and corresponds to the first sliding sleeve (73), the end of the spring compression rod (76) away from the top rod (79) is inserted into the second sliding sleeve (74), and the second compression spring (72) is sleeved on the spring compression rod (76), one end of which is connected to the bottom shoulder of the spring compression rod (76), and the other end is connected to the second sliding sleeve (74) to form a flexible compression sleeve; The third compression spring (713) is arranged between the hinge fixed end (711) and the horizontal plate of the hinge movable end knife holder (712); a mechanical trigger slideway (714) is provided on the upper portion of the hinge movable end knife holder (712); a trigger block (78) is installed at the end of the spring compression rod (76) close to the top rod (79); and a side knife (77) is installed at the bottom of the horizontal plate of the hinge movable end knife holder (712).

6. The automatic yarn pressing device for composite material grid production according to claim 5, characterized in that: The plurality of middle pressing knives (53) and the side knives (77) are distributed at equal intervals, and their length directions are all in the meridian direction, respectively corresponding to the meridian grid forming grooves evenly distributed in the forming mold (1).

7. The automatic yarn pressing device for composite material grid production according to claim 2, characterized in that: Guide rail guards (13) for protecting the warp linear guide rails (23) are installed on both sides of the forming mold (1). The cross section of the guide rail guards (13) is a broken line shape, one side of which is fixedly connected to the side end of the forming mold (1), and the other side extends to the warp linear guide rails (23), the warp travel power slide (21) and above the warp travel slide.

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