Method for producing a nonwoven scrim

Abstract

The application discloses a production method of a non-woven mesh cloth and relates to the technical field of non-woven fabrics. Step S1: warp yarns are drawn out from a warp yarn drawing frame, a plurality of warp yarns are sequentially wound around two three-roller yarn guiding machines, the warp yarns pass through a glue coating machine and a drying box, and finally, the warp yarns are wound on a winding machine, the winding machine is used for winding, and the warp yarns between the two three-roller yarn guiding machines are kept in a traction tension state and run below a weft yarn arrangement station; step S2: weft yarns are drawn out from a weft yarn drawing frame, the weft yarn arrangement station lays the weft yarns on the warp yarns, a weft yarn laying action is repeated several times according to design requirements, and a multi-layer mesh-shaped fiber structure is formed; and step S3: when the weft yarns are laid each time, a pre-gluing station sprays hot melt adhesive on the intersection points of the weft yarns and the warp yarns, and the intersection points are adhered firmly. The three weft yarn clamps are used in a rotating and alternating mode to complete clamping, cutting and laying of the weft yarns, the intersection points of the weft yarns and the warp yarns are pre-adhered, and the production efficiency and quality of the mesh cloth are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of non-woven fabrics, in particular to a production method of non-woven grid cloth. BACKGROUND

[0002] Non-woven grid cloth is a kind of textile made by layering, bonding or sewing fibers or sheets. In the production process of non-woven grid cloth, first, the warp and weft filaments are laid flat and overlapped to form a grid-shaped fiber structure with the warp filaments on the bottom and the weft filaments on the top under the action of traction tension; then hot adhesive is sprayed on the grid-shaped fiber structure to bond the intersection points of the warp and weft filaments; and then drying and winding are sequentially performed to obtain non-woven hot-bonded grid cloth.

[0003] In the production of grid cloth with multiple layers of fiber structure, it is necessary to lay weft filaments one by one. If a weft filaments laying device is used, the weft filaments laying device needs to be repeatedly operated back and forth, resulting in low production efficiency. If a rotary weft filaments laying method is used, the angle between each layer of weft filaments and warp filaments is not easy to adjust. Regardless of whether a weft filaments laying device or a rotary weft filaments laying method is used, the adhesive is sprayed after the weft filaments are laid, and the adhesive is not easy to penetrate to the inside, resulting in uneven adhesive bonding. In addition, during the waiting period for weft filaments laying, the weft filaments laid first are prone to tension changes, which in turn leads to uneven tension of the entire grid cloth, and the yarn layers are already spread out during the drying stage. Based on this, the present application proposes a production method of non-woven grid cloth. SUMMARY

[0004] The purpose of the present application is to provide a production method of non-woven grid cloth to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0006] The production method of non-woven grid cloth comprises the following steps:

[0007] Step S1: The warp filaments are drawn out from the warp filaments creel, and then several warp filaments are sequentially wound around two three-roller yarn guides, and then pass through the adhesive applicator and the drying oven, and finally are wound on the winding machine. The warp filaments between the two three-roller yarn guides are kept in a traction tension state and run below the weft filaments laying station;

[0008] Step S2: The weft filaments are drawn out from the weft filaments creel, and the weft filaments laying station lays the weft filaments on the warp filaments. According to design requirements, the weft filaments laying action is repeated several times to form a multi-layer grid-shaped fiber structure;

[0009] Step S3: When laying the weft filaments each time, the intersection points of the weft filaments and the warp filaments are sprayed with hot melt adhesive by the pre-adhesive spraying station to firmly bond the intersection points;

[0010] Step S4: The multi-layer grid-shaped fiber structure is sequentially transported to the glue coating machine and drying box through the winding machine, the water-based hot melt adhesive is sprayed on the multi-layer grid-shaped fiber structure through the glue coating machine, and then the drying box is dried to make the warp and weft yarns on the multi-layer grid-shaped fiber structure firmly adhere to form a grid cloth;

[0011] Step S5: The dried grid cloth is wound through the winding machine.

[0012] Preferably, the laying of the weft yarns is completed by three weft yarn clamping plates arranged in a ring array and slidingly assembled in the vertical direction; the three weft yarn clamping plates are fixedly installed on a center plate, and the center plate is slidingly assembled in the vertical direction; the weft yarn clamping plate comprises a U-shaped sliding plate, the inner cavity of the U-shaped sliding plate slidingly connects a first tooth plate and a second tooth plate arranged in overlap, the first tooth plate and the second tooth plate are both in a comb tooth structure, the combs between the first tooth plate and the second tooth plate form weft yarn channels for the weft yarns to pass through, and the first tooth plate and the second tooth plate relatively move along the length direction of the U-shaped sliding plate to clamp the weft yarns arranged in the weft yarn channels.

[0013] Preferably, each tooth structure on the first tooth plate is slidingly connected with a first protruding tooth along the length direction of the first tooth plate, each tooth structure on the second tooth plate is slidingly connected with a second protruding tooth along the length direction of the second tooth plate, and the second protruding tooth and the first protruding tooth are arranged in stagger; when the first tooth plate and the second tooth plate overlap, an inner and outer two-layer comb tooth structure is formed, taking the reference direction of being close to the warp yarn as the inner and being far from the warp yarn as the outer, the outer comb tooth structure keeps clamping the weft yarn, and as the first tooth plate and the second tooth plate continue to relatively move, the inner comb tooth structure and the outer comb tooth structure are dislocated to shear the weft yarn.

[0014] Preferably, the first protruding tooth is provided with a limiting rod at one end close to the first tooth plate, the first tooth plate is provided with a limiting slot corresponding to the position of the first tooth plate, the limiting rod is slidingly assembled in the limiting slot, a first return spring is installed in the limiting slot, and the other end of the first return spring is fixedly connected with the limiting rod; the second protruding tooth is slidingly connected with the second tooth plate in the same structure.

[0015] Preferably, the first tooth plate is provided with a first magnet and a second magnet at two ends respectively, the magnetism of the first magnet and the second magnet is opposite, and the first tooth plate is provided with a first spring at one end; the second tooth plate is provided with a third magnet and a fourth magnet at two ends respectively, the magnetism of the third magnet and the fourth magnet is opposite, and the second tooth plate is provided with a second spring at one end; the magnetism of the third magnet and the first magnet located on the same side is opposite, and the magnetism of the fourth magnet and the second magnet located on the same side is opposite; the two ends of the U-shaped sliding plate are both provided with electromagnets with the same magnetism.

[0016] Preferably, the pre-gluing station is composed of a plurality of pre-gluing openings arranged in a rectangular array, all of which are communicated with the glue pool, the pre-gluing opening comprises an insertion tube, a first partition ring is installed in the insertion tube, a first baffle is hingedly connected to the upper end of the first partition ring, the first baffle can completely cover the central through hole of the first partition ring, a movable tube is slidably connected in the inner cavity of the insertion tube, and the movable tube extends above the insertion tube, a second partition ring is installed at the lower end of the movable tube, a second baffle is hingedly connected to the upper end of the second partition ring, and the second baffle can completely cover the central through hole of the second partition ring; the first baffle and the second baffle are filled with glue, the inner cavity of the movable tube is filled with glue, and the circumference of the movable tube is sleeved with a second return spring.

[0017] Preferably, the inside of the glue pool is provided with a piston, and the glue is stored above the piston. As the glue is consumed, the piston gradually moves upward, so that the liquid level of the glue remains unchanged.

[0018] Preferably, the weft filament clamping plate is fixedly installed on the movable end of the linear module, the linear module is arranged parallel to the transportation direction of the warp filament, and the three linear modules are fixedly connected with the center plate. One side of the center plate is provided with a mounting seat, a servo motor is installed in the mounting seat, and the motor shaft of the servo motor is fixedly connected with the center of the center plate. A fixed seat is arranged above the mounting seat, the fixed seat is installed in a hoisting manner, a telescopic cylinder is installed at the upper end of the fixed seat, and the piston rod of the telescopic cylinder is fixedly connected with the mounting seat.

[0019] Preferably, the upper end surface of the pre-gluing station composed of a plurality of weft filament clamping plates has a structure that is high in the middle and low at the four corners.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] (1) The present application realizes the laying task of multiple layers of weft filaments by setting three weft filament clamping plates to alternately clamp and cut the weft filaments, improves the laying efficiency of the weft filaments, and the weft filament clamping plate can slide along its length direction to change the inclination angle of the weft filament, thereby improving the application range.

[0022] (2) The present application realizes the integrated design of clamping and cutting of the weft filaments by relatively close movement of the first and second toothed plates arranged in an overlapping manner, reduces the size of the device, and keeps clamping the weft filaments during the cutting process, thereby facilitating the laying of the next layer of weft filaments.

[0023] (3) The present application sprays glue on the intersection of the weft filament and the warp filament through the pre-gluing opening, which not only reduces the change of tension of the weft filament during the laying process, but also ensures that the inside of the mesh cloth is evenly coated with glue, thereby improving the glue quality.

[0024] (4) The present application sets up the pre-glue station with high middle and low four sides to make up for the problem that the middle area of the entire mesh cloth has large deformation degree and the four sides area has small deformation degree, balance the tension of each area of the entire mesh cloth, reduce the probability of yarn layer scattering in the subsequent drying step, and improve the quality of the mesh cloth. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the principles of the present application, and are not intended to limit the present application, in the drawings:

[0026] Figure 1 The device structure schematic diagram for realizing the entire mesh cloth production method proposed in the embodiments of the present application;

[0027] Figure 2 The structure schematic diagram of the weft wire clamping plate in the embodiments of the present application;

[0028] Figure 3 The initial state schematic diagram of the weft wire clamping plate in the embodiments of the present application;

[0029] Figure 4 The cross-sectional structure schematic diagram of the U-shaped slide plate in the embodiments of the present application;

[0030] Figure 5 The structure schematic diagram of the first tooth plate and the second tooth plate in the embodiments of the present application;

[0031] Figure 6 The state schematic diagram of the weft wire clamping plate in the embodiments of the present application in clamping the weft wire;

[0032] Figure 7 The state schematic diagram of the weft wire clamping plate in the embodiments of the present application in cutting the weft wire;

[0033] Figure 8 The structure schematic diagram of the first protruding tooth in the embodiments of the present application;

[0034] Figure 9 The partial structure schematic diagram of the first tooth plate in the embodiments of the present application;

[0035] Figure 10 The installation structure schematic diagram of the center plate in the embodiments of the present application;

[0036] Figure 11 The installation structure schematic diagram of the pre-glue port in the embodiments of the present application;

[0037] Figure 12 The cross-sectional structure schematic diagram of the pre-glue port in the embodiments of the present application;

[0038] Figure 13The schematic diagram of the three-layer weft filament laying in the embodiment of the present application.

[0039] In the figure: 1, three-roller yarn drawing machine; 4, gluing machine; 5, drying box; 6, winding machine;

[0040] 2, weft filament clamping plate; 21, straight line module; 22, U-shaped slide plate; 221, electromagnet; 23, first toothed plate; 231, first magnet; 232, second magnet; 233, first spring; 234, first protruding tooth; 2341, limiting rod; 2342, first return spring; 235, limiting groove; 24, second toothed plate; 241, third magnet; 242, fourth magnet; 243, second spring; 244, second protruding tooth; 25, center plate; 251, servo motor; 252, mounting seat; 253, fixed seat; 254, telescopic cylinder; 255, guide rod; 256, bottom plate;

[0041] 3, pre-gluing port; 31, insertion pipe; 311, glue pool; 312, mounting frame; 313, electric cylinder; 314, observation window; 315, glue injection port; 316, glue discharge port; 32, first separation ring; 33, first baffle; 34, movable pipe; 35, second separation ring; 36, second baffle; 37, second return spring; 38, glue outlet. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0043] The embodiment proposes a production method of non-woven mesh cloth, comprising the following steps:

[0044] Step S1: the warp filaments are drawn from a warp filament drawing frame (not shown in the figure), and then several warp filaments are sequentially wound around two three-roller yarn drawing machines 1, and then pass through a gluing machine 4 and a drying box 5, and finally are wound on a winding machine 6, and are wound by the winding machine 6, so that the warp filaments between the two three-roller yarn drawing machines 1 are kept in a state of traction tension and run below the weft filament arrangement station;

[0045] Step S2: the weft yarn is drawn from the weft yarn creel (not shown in the figure), and the weft yarn laying station lays the weft yarn on the warp yarn. According to the design requirements, the weft yarn laying action is repeated several times to form a multi-layer grid-shaped fiber structure;

[0046] Step S3: each time the weft yarn is laid, the pre-gluing station sprays hot melt adhesive at the intersection of the weft yarn and the warp yarn to firmly bond the intersection;

[0047] Step S4: the bonded multi-layer grid-shaped fiber structure is sequentially transported to the glue applicator 4 and the drying box 5 by the winding machine 6, the water-based hot melt adhesive is sprayed on the multi-layer grid-shaped fiber structure by the glue applicator 4, and then the drying box 5 is dried to firmly bond the warp and weft yarns on the multi-layer grid-shaped fiber to form a grid cloth;

[0048] Step S5: the grid cloth after drying is wound by the winding machine 6.

[0049] In the weft yarn laying station, three weft yarn clamping plates 2 arranged in a ring array are slidably assembled along the vertical direction to complete the clamping, cutting and laying of the weft yarn in a rotating and alternating manner. Specifically, the three weft yarn clamping plates 2 are fixedly installed on the center plate 25, and the center plate 25 is slidably assembled along the vertical direction. The weft yarn clamping plate 2 comprises a U-shaped slide plate 22, the inner cavity of the U-shaped slide plate 22 is slidably connected with a first tooth plate 23 and a second tooth plate 24 arranged in overlap, the first tooth plate 23 and the second tooth plate 24 are both in a comb-tooth structure, the combs between the first tooth plate 23 and the second tooth plate 24 form a weft yarn channel for passing the weft yarn, and the first tooth plate 23 and the second tooth plate 24 move relatively along the length direction of the U-shaped slide plate 22 to clamp the weft yarn passing through the weft yarn channel. The two weft yarn clamping plates 2 clamp the two ends of the weft yarn, and then the center plate 25 moves towards the warp yarn along the vertical direction to lay the weft yarn on the warp yarn;

[0050] After the first layer of weft filaments is laid, the two ends of the first layer of weft filaments need to be cut, therefore, in the application, the weft filaments placed in the weft filament channel are cut by the relative movement of the first tooth plate 23 and the second tooth plate 24, and at the same time, in order to complete the subsequent weft filament laying task, the weft filament clamping plate 2 close to the weft filament creel needs to keep clamping the weft filaments, specifically: each tooth-like structure on the first tooth plate 23 is slidably connected with a first protruding tooth 234 along the length direction of the first tooth plate 23, each tooth-like structure on the second tooth plate 24 is slidably connected with a second protruding tooth 244 along the length direction of the second tooth plate 24, the second protruding tooth 244 and the first protruding tooth 234 are staggered; when the first tooth plate 23 and the second tooth plate 24 overlap, a comb-like structure of two layers of inside and outside is formed, taking the reference direction of being close to the warp filament as inside and being far away from the warp filament as outside, the comb-like structure on the outside keeps clamping the weft filaments, and with the continuous relative movement of the first tooth plate 23 and the second tooth plate 24, the comb-like structure on the inside and the comb-like structure on the outside are dislocated to shear and cut the weft filaments.

[0051] In the embodiment, the first protruding tooth 234 is provided with a limiting rod 2341 close to one end of the first tooth plate 23, the first tooth plate 23 is provided with a limiting groove 235 corresponding to the position of the first tooth plate 23, the limiting rod 2341 is slidably assembled in the limiting groove 235, a first return spring 2342 is installed in the limiting groove 235, and the other end of the first return spring 2342 is fixedly connected with the limiting rod 2341; the second protruding tooth 244 is slidably connected with the second tooth plate 24 in the same structure. Taking the second tooth plate 24 as outside and the first tooth plate 23 as inside as an example: in the initial state, the width of the weft filament channel is the largest; after the weft filaments are arranged in the weft filament channel, the first tooth plate 23 and the second tooth plate 24 move synchronously and relatively, the first protruding tooth 234 and the second tooth plate 24 form the comb-like structure on the outside to clamp the weft filaments, and the first tooth plate 23 and the second protruding tooth 244 form the comb-like structure on the inside to also clamp the weft filaments; when it is needed to cut the weft filaments, the first tooth plate 23 and the second tooth plate 24 continue to move relatively, the comb-like structure on the outside keeps clamping the weft filaments on the outside, and the comb-like structure on the inside and the comb-like structure on the outside are dislocated to shear and cut the weft filaments.

[0052] On the basis of the above scheme, in order to further improve the efficiency of cutting the weft filaments, the first tooth plate 23 and the second protruding tooth 244 are provided with staggered knife edge structures close to each other.

[0053] In order to realize the relative movement of the first tooth plate 23 and the second tooth plate 24, if a mechanical structure is used for driving, the structure of the weft thread clamping plate 2 will be complex and the volume will be increased, therefore, in the application, magnetic driving is used, specifically, the two ends of the first tooth plate 23 are respectively provided with a first magnet 231 and a second magnet 232, and the magnetism of the first magnet 231 and the second magnet 232 is opposite, and one end of the first tooth plate 23 is provided with a first spring 233; the two ends of the second tooth plate 24 are respectively provided with a third magnet 241 and a fourth magnet 242, and the magnetism of the third magnet 241 and the fourth magnet 242 is opposite, and one end of the second tooth plate 24 is provided with a second spring 243; the third magnet 241 and the first magnet 231 located on the same side are opposite in magnetism, and the fourth magnet 242 and the second magnet 232 located on the same side are opposite in magnetism; the two ends of the U-shaped slide plate 22 are both provided with electromagnets 221 which are the same in magnetism. In the embodiment, the first magnet 231 and the fourth magnet 242 are N poles, the second magnet 232 and the second spring 243 are S poles, the electromagnet 221 is an N pole, the first spring 233 is on the same side as the second magnet 232, the second spring 243 is on the same side as the third magnet 241, and in the initial state, the two electromagnets 221 are both in the closed state, the first tooth plate 23 keeps the movement trend to the left under the thrust of the first spring 233, and the second tooth plate 24 keeps the movement trend to the right under the thrust of the second spring 243, at this time, the two ends of the first tooth plate 23 and the second tooth plate 24 are flush, and the width of the weft thread channel is at the maximum value, when the weft thread passes through the weft thread channel, any one of the electromagnets 221 is started, and in the embodiment, the right electromagnet 221 is taken as an example, the right electromagnet 221 is electrified to generate magnetic force, generates an attractive force on the second magnet 232 and a repulsive force on the fourth magnet 242, so that the first tooth plate 23 moves to the right and squeezes the first spring 233, the second tooth plate 24 moves to the left and squeezes the second spring 243, the width of the weft thread channel is reduced, and the weft thread is clamped; when it is needed to cut off the weft thread, the left electromagnet 221 is started again, the left electromagnet 221 forms a repulsive force on the first magnet 231 and an attractive force on the third magnet 241, further pushes the first tooth plate 23 to move to the right, and the second tooth plate 24 moves to the left, so that the weft thread is broken by the shearing force; the power supply of the two electromagnets 221 is cut off, and the first tooth plate 23 and the second tooth plate 24 are reset under the elastic force of the first spring 233 and the second spring 243 respectively.

[0054] When both ends of the first layer of weft yarns are cut off, the tension of the weft yarns changes, therefore, in order to reduce the tension change between the first layer of weft yarns and the warp yarns, the present application is arranged with a pre-gluing station below the intersection of the warp yarns and the weft yarns, which sprays glue on the intersection to fix it, specifically: the pre-gluing station is composed of a plurality of pre-gluing ports 3 arranged in a rectangular array, all of which are communicated with a glue pool 311, the pre-gluing port 3 includes an insertion tube 31, the inside of the insertion tube 31 is installed with a first partition ring 32, the upper end of the first partition ring 32 is hinged with a first baffle 33, the first baffle 33 can completely cover the center through hole of the first partition ring 32, the inner cavity of the insertion tube 31 is slidingly connected with a movable tube 34, and the movable tube 34 extends above the insertion tube 31, the lower end of the movable tube 34 is installed with a second partition ring 35, the upper end of the second partition ring 35 is hinged with a second baffle 36, and the second baffle 36 can completely cover the center through hole of the second partition ring 35; the first baffle 33 and the second baffle 36 are filled with glue, the inner cavity of the movable tube 34 is filled with glue; the circumference of the movable tube 34 is sleeved with a second return spring 37. When the warp yarns are laid, the warp yarns contact with the upper end of the movable tube 34, and the movable tube 34 remains stationary; when the weft yarns are laid on the warp yarns, the movable tube 34 is driven to move downward by the force generated when the weft yarns press the warp yarns downward, the movable tube 34 extrudes the glue between the first baffle 33 and the second baffle 36 downward, and the glue in the space pushes open the second baffle 36 and enters the inner cavity of the movable tube 34, in this process, the first baffle 33 remains closed state under the action of pressure, the glue is finally sprayed out through the glue outlet 38 integrally formed at the upper end of the movable tube 34, and sprayed on the intersection of the warp yarns and the weft yarns; when both ends of the warp yarns are cut off, the movable tube 34 moves upward and resets under the elastic force of the second return spring 37, at the same time, suction force is generated, so that the glue in the glue pool 311 pushes open the first baffle 33 and enters the space between the first baffle 33 and the second baffle 36, in this process, the second baffle 36 remains closed state under the action of atmospheric pressure and the weight of the glue.

[0055] As the glue in the glue pool 311 is constantly replenished into the insertion tube 31, as the glue is consumed, the glue liquid level in the glue pool 311 is constantly lowered, which easily causes the insertion tube 31 to be difficult to suck in enough glue, therefore, the piston (not shown in the figure) is arranged in the inside of the glue pool 311, the glue is stored above the piston, as the glue is consumed, the piston gradually moves upward, so that the liquid level of the glue remains unchanged. Specifically, the glue pool 311 is installed on the mounting frame 312, the electric cylinder 313 is fixedly installed in the inside of the mounting frame 312 in the vertical direction, the piston rod of the electric cylinder 313 is movably penetrated through the lower wall of the glue pool 311 and is fixedly connected with the piston, the piston is driven to move through the extension and retraction movement of the piston rod of the electric cylinder 313. In addition, in order to facilitate the observation of the content of the glue in the glue pool 311, the observation window 314 is embedded in the surface of the glue pool 311 in the embodiment, the remaining content of the glue can be observed through the observation window 314; the glue inlet 315 and the glue outlet 316 are also installed on the surface of the glue pool 311, the glue is input into the glue pool 311 through the glue inlet 315, and the glue in the glue pool 311 is discharged through the glue outlet 316.

[0056] When the two ends of the first layer of weft filaments are cut off, in order to avoid the collision between the weft filament clamping plate 2 and the warp filaments during the rotation process, the center plate 25 moves upward along the vertical direction, then the weft filament clamping plate 2 rotates one hundred and twenty degrees, the weft filament clamping plate 2 that clamps the weft filaments is turned to the other side, the weft filament clamping plate 2 that does not participate in the clamping of the first layer of weft filaments is in contact with the weft filaments after being turned, and clamps the weft filaments, until the two ends of the weft filaments are fixed, the center plate 25 moves downward along the vertical direction again, and the second layer of weft filaments is laid on the first layer of weft filaments, when the second layer of weft filaments presses the first layer of weft filaments downward, the pre-glue nozzle 3 that is extruded sprays glue again, and the intersection point of the second layer of weft filaments and the first layer of weft filaments is firmly adhered, the above operation is repeated until the laying of the multiple layers of weft filaments is completed.

[0057] In addition, if the warp yarn and the weft yarn adopt the stacking mode of plain orthogonal, that is, the warp yarn is 0° and the weft yarn is 90°, the whole mesh cloth has poor bending resistance, for example, the plain orthogonal hot melt felt of the glass fiber mesh, due to the brittle fracture characteristics of the glass fiber itself, the finished sleeve material is inevitably folded during the factory handling, transportation and blade construction process, and the whole warp yarn or weft yarn is broken due to slight bending of the plain orthogonal hot melt felt, so that the large plate material is broken into small pieces, which disturbs the production of the blade, in order to avoid folding, the core material manufacturer often needs a large paper box to package the sleeve material, which increases the packaging cost and greatly increases the loading difficulty, and the whole warp yarn or weft yarn is broken due to slight bending, so that the large plate material is broken into small pieces. Therefore, in order to improve the bending resistance of the mesh cloth, the non-woven mesh cloth provided by the present application adopts a four-layer structure of one warp yarn and three weft yarns, and at least two weft yarns are arranged in opposite inclined manner. Specifically, in the embodiment, the warp yarn is 0°, the first layer of weft yarn is -45°, the second layer of weft yarn is 45°, and the third layer of weft yarn is 90°. The length direction of the warp yarn is the length direction of the mesh cloth, which ensures the normal production of the mesh cloth and prevents stretching and deformation during winding. If the mesh cloth is folded along the perpendicular direction of the warp yarn, the bending amplitude of the weft yarn arranged in the inclined manner is much smaller than that of the warp yarn, and the included angle between the two ends of the bent weft yarn is not 0°, so that the impact force on the bending point of the weft yarn is reduced. When the mesh cloth is folded and twisted, the force is dispersed in three directions, reducing the probability of complete rupture.

[0058] In order to realize the inclined arrangement of the weft yarn, the weft yarn clamp plate 2 in the present application is fixedly installed on the movable end of the linear module 21, the linear module 21 is arranged parallel to the transportation direction of the warp yarn, the three linear modules 21 are fixedly connected with the center plate 25, the U-shaped slide plate 22 is driven to move through the linear module 21, and then the inclination angle of the weft yarn is changed. In addition, the rotation of the center plate 25 is driven by the servo motor 251, and the lifting of the center plate 25 is driven by the telescopic cylinder 254. Specifically, one side of the center plate 25 is provided with a mounting seat 252, the inside of the mounting seat 252 is provided with a servo motor 251, the motor shaft of the servo motor 251 is fixedly connected with the center of the center plate 25; a fixed seat 253 is arranged above the mounting seat 252, the fixed seat 253 is arranged in a lifting manner, a telescopic cylinder 254 is installed at the upper end of the fixed seat 253, the piston rod of the telescopic cylinder 254 is fixedly connected with the mounting seat 252. In order to improve the stability of the mounting seat 252 in the vertical direction, two guide rods 255 are installed at the lower end of the fixed seat 253 in the embodiment, the guide rods 255 are movably penetrated through the mounting seat 252, and a bottom plate 256 is fixedly installed at the lower end of the two guide rods 255. Through the guiding effect of the guide rods 255, the stability of the mounting seat 252 during movement is improved.

[0059] During the laying of the weft yarn, since both ends of the weft yarn are fixed, the rigidity of the area close to the two ends of the weft yarn is relatively large, and the deformation degree is relatively small, the rigidity of the middle area of the weft yarn is relatively small, and the deformation degree is relatively large, and for the same reason, the rigidity of the middle area of the warp yarn is also smaller than that of the two end areas, when the weft yarn presses the warp yarn downward, the deformation degree is larger closer to the intersection point of the middle area, and the deformation degree is smaller farther away from the intersection point of the middle area, resulting in different tightness degrees of each area in the entire mesh cloth, affecting the adhesive force of the glue, therefore, the upper end face of the pre-gluing station composed of a plurality of weft yarn clamps 2 is designed as a structure with high middle and low four sides, which is used to solve the problem of the relatively loose middle area of the mesh cloth, balance the overall tension of the entire mesh cloth, reduce the probability of the mesh cloth being scattered during drying in the drying box 5, and improve the production quality of the mesh cloth.

[0060] It should be noted that the three-roll yarn drawing machine 1, the gluing machine 4, the drying box 5, and the winding machine 6 in the present application all adopt the currently known devices, since they are not the focus of the technical solution claimed in the present application, therefore, they will not be described in detail.

[0061] In the description of the present application, the terms "first", "second", "another", "yet another" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0062] In the description of the present application, it should be noted that, unless otherwise specifically specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected, it can be mechanically connected, or electrically connected, it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0063] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A method for producing nonwoven mesh fabric, characterized in that: Includes the following steps: Step S1: Draw out the warp yarn from the warp yarn unwinding frame, then pass several warp yarns around the two three-roller drawing machines (1) in sequence, then through the glue coating machine (4) and the drying box (5), and finally wind them onto the winding machine (6). The winding machine (6) is used to wind the warp yarns, so that the warp yarns between the two three-roller drawing machines (1) maintain the traction tension and run below the weft yarn arrangement station. Step S2: Draw out the weft yarn from the weft yarn feeding frame. The weft yarn laying station lays the weft yarn on the warp yarn. According to the design requirements, repeat the weft yarn laying action several times to form a multi-layered mesh fiber structure. Step S3: Each time the weft yarn is laid, the pre-spraying station sprays hot melt adhesive at the intersection of the weft and warp yarns to firmly bond the intersection. Step S4: The bonded multi-layer mesh fiber structure is sequentially conveyed to the glue applicator (4) and the drying oven (5) by the winding machine (6). Water-based hot melt adhesive is sprayed onto the multi-layer mesh fiber structure by the glue applicator (4), and then dried in the drying oven (5) to make the warp and weft threads on the multi-layer mesh fiber bond firmly to form a mesh fabric. Step S5: The dried mesh fabric is wound up using a winding machine (6); The weft yarn is laid by three weft yarn clamps (2) arranged in a ring array and slidably assembled in the vertical direction; the three weft yarn clamps (2) are all fixedly installed on the center plate (25), which is slidably assembled in the vertical direction; the weft yarn clamps (2) include a U-shaped slide plate (22), and the inner cavity of the U-shaped slide plate (22) is slidably connected to an overlapping first toothed plate (23) and a second toothed plate (24). The first toothed plate (23) and the second toothed plate (24) are both comb-shaped structures, and a weft yarn channel for passing through the weft yarn is formed between the comb teeth of the first toothed plate (23) and the second toothed plate (24). The first toothed plate (23) and the second toothed plate (24) move relative to each other along the length direction of the U-shaped slide plate (22) to clamp the weft yarn passing through the weft yarn channel; Each toothed structure on the first toothed plate (23) is slidably connected with a first protruding tooth (234) along the length direction of the first toothed plate (23), and each toothed structure on the second toothed plate (24) is slidably connected with a second protruding tooth (244) along the length direction of the second toothed plate (24). The second protruding tooth (244) and the first protruding tooth (234) are staggered. When the first toothed plate (23) and the second toothed plate (24) overlap, a comb-like structure with inner and outer layers is formed. With the reference direction being closer to the warp yarn as the inside and farther from the warp yarn as the outside, the outer comb-like structure maintains the clamping of the weft yarn. As the first toothed plate (23) and the second toothed plate (24) continue to move relative to each other, the inner comb-like structure and the outer comb-like structure are misaligned, resulting in shearing that cuts the weft yarn.

2. The method for producing nonwoven mesh fabric according to claim 1, characterized in that: A limiting rod (2341) is installed at one end of the first protruding tooth (234) near the first tooth plate (23). A limiting groove (235) is opened on the first tooth plate (23) corresponding to the position of the first tooth plate (23). The limiting rod (2341) is slidably assembled in the limiting groove (235). A first return spring (2342) is installed in the limiting groove (235). The other end of the first return spring (2342) is fixedly connected to the limiting rod (2341). The second protruding tooth (244) adopts the same structure and is slidably connected to the second tooth plate (24).

3. The method for producing nonwoven mesh fabric according to claim 1 or 2, characterized in that: The first toothed plate (23) has a first magnet (231) and a second magnet (232) installed at both ends, and the first magnet (231) and the second magnet (232) have opposite magnetic properties. The first toothed plate (23) has a first spring (233) installed at one end. The second toothed plate (24) has a third magnet (241) and a fourth magnet (242) installed at both ends, and the third magnet (241) and the fourth magnet (242) have opposite magnetic properties. The second toothed plate (24) has a second spring (243) installed at one end. The third magnet (241) and the first magnet (231) on the same side have opposite magnetic properties, and the fourth magnet (242) and the second magnet (232) on the same side have opposite magnetic properties. The U-shaped slide plate (22) has electromagnets (221) with the same magnetic properties installed at both ends.

4. The method for producing nonwoven mesh fabric according to claim 1, characterized in that: The pre-spraying station consists of several pre-spraying nozzles (3) arranged in a rectangular array. All pre-spraying nozzles (3) are connected to the glue tank (311). Each pre-spraying nozzle (3) includes an insertion tube (31). A first spacer (32) is installed inside the insertion tube (31). A first baffle (33) is hinged to the upper end of the first spacer (32). The first baffle (33) can completely cover the central through hole of the first spacer (32). A movable tube (34) is slidably connected to the inner cavity of the insertion tube (31). The movable tube (34) extends above the insertion tube (31). A second spacer (35) is installed at the lower end of the movable tube (34). A second baffle (36) is hinged to the upper end of the second spacer (35), and the second baffle (36) can completely cover the central through hole of the second spacer (35). The space between the first baffle (33) and the second baffle (36) is filled with glue, and the inner cavity of the movable tube (34) is filled with glue. A second return spring (37) is sleeved on the circumferential surface of the movable tube (34).

5. The method for producing nonwoven mesh fabric according to claim 4, characterized in that: The glue tank (311) is equipped with a piston inside, and the glue is stored above the piston. As the glue is consumed, the piston moves upward gradually, so that the liquid level of the glue remains unchanged.

6. The method for producing nonwoven mesh fabric according to claim 1, characterized in that: The weft clamp (2) is fixedly installed on the movable end of the straight module (21). The straight module (21) is set parallel to the transport direction of the warp yarn. All three straight modules (21) are fixedly connected to the center plate (25). A mounting seat (252) is arranged on one side of the center plate (25). A servo motor (251) is installed inside the mounting seat (252). The motor shaft of the servo motor (251) is fixedly connected to the center of the center plate (25). A fixed seat (253) is arranged above the mounting seat (252). The fixed seat (253) is installed by hoisting. A telescopic cylinder (254) is installed at the upper end of the fixed seat (253). The piston rod of the telescopic cylinder (254) is fixedly connected to the mounting seat (252).

7. The method for producing nonwoven mesh fabric according to claim 1, characterized in that: The upper surface of the pre-spraying station, which consists of several weft wire clamps (2), has a structure that is high in the middle and low around the edges.

Images