Stitched felt prepared using waste basalt fiber, preparation method thereof and stitched felt preparation device

Abstract

The present invention discloses a stitched felt prepared by using waste basalt fibers, a preparation method thereof and a stitched felt preparation device. The stitched felt prepared by using waste basalt fibers comprises a basalt fiber layer and a yarn stitching the basalt fiber layer into a whole, and the basalt fiber layer is formed by uniformly laying waste basalt fibers and / or basalt fibers. The stitched felt preparation device using waste basalt fibers comprises a short cutter, a uniform web forming machine, an air web forming machine, a stitching machine and a winding machine connected in sequence. The present application can evenly disperse and web the waste basalt fibers by improving the structure of the web forming machine, etc., and solves the problems of easy agglomeration, difficult dispersion and poor uniformity of the waste basalt fibers. The prepared stitched felt has good uniformity and high strength, and can be used for wind power generation, ships, automobiles, high-speed trains, sports equipment, protection, construction, etc.; waste basalt fibers can also be effectively utilized, saving resources, reducing energy consumption, reducing costs, and realizing the real transformation of waste into treasure.

Description

Technical Field

[0001] The invention relates to a stitched felt prepared by using waste basalt fibers, a preparation method thereof and a stitched felt preparation device, and belongs to the field of stitched felt. Background Art

[0002] Basalt fiber is a continuous fiber made by melting natural basalt at 1450℃~1500℃ and then drawing it at high speed through a platinum-rhodium alloy drawing plate. Basalt fiber is a new type of inorganic environmentally friendly green high-performance fiber material, which is composed of oxides such as silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, iron oxide and titanium dioxide. Basalt continuous fiber not only has high strength, but also has many excellent properties such as electrical insulation, corrosion resistance and high temperature resistance. It has been widely used in fiber-reinforced composite materials, friction materials, shipbuilding materials, thermal insulation materials, automotive industry, high-temperature filtration materials, protection, aerospace and other fields.

[0003] Waste basalt fiber is the inevitable industrial tailings produced during the production or use of basalt fiber. Generally, the output of waste basalt fiber accounts for 10-15% of the total output of basalt fiber. Since waste basalt fiber is easy to agglomerate, difficult to disperse, and has poor uniformity, it has always been treated by deep burial. Since waste basalt fiber has the characteristics of being degradable, even if it is treated by deep burial, the harm it brings is relatively small. However, if waste basalt fiber can be fully used in social production and turned into treasure, it can save resources, reduce energy consumption, and reduce costs, which has a very important social significance. Summary of the invention

[0004] The present invention provides a stitched felt prepared by using waste basalt fibers, a preparation method thereof and a stitched felt preparation device. By using the stitched felt preparation device of the present invention, the waste basalt fibers can be evenly dispersed and webbed to prepare a stitched felt with high uniformity and high strength, which can be used for wind power generation, ships, automobiles, high-speed trains, sporting goods, protection, construction, etc.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] A stitched felt made of waste basalt fibers comprises a basalt fiber layer and a yarn stitching the basalt fiber layer into a whole, wherein the basalt fiber layer is formed by evenly laying waste basalt fibers and / or basalt fibers; the waste basalt fibers and / or basalt fibers have a length of 3 to 8 cm and a diameter of 5 to 14 μm; the yarn is a polyester yarn, and the diameter of the polyester yarn is 50 to 150D.

[0007] The stitched felt has good uniformity and high strength.

[0008] In order to balance the requirements of cost and strength, the needle density of the yarn is 500-900 needles / m 2 .

[0009] In order to meet the needs of different occasions, the thickness of the stitched felt is 2-6mm and the weight is 300-800g / m 2 .

[0010] A method for making stitched felt using waste basalt fibers comprises cutting waste basalt fibers and / or basalt fibers into short pieces, homogenizing them into a web by a uniform web forming machine, and then uniformly distributing them in an air-flow web forming machine, and then stitching them with polyester yarn to obtain basalt stitched felt.

[0011] The above-mentioned basalt stitched felt, as a new type of base material, can be widely used in the fields of wind power generation, ships, automobiles, high-speed trains, sports equipment, protection, construction, etc.

[0012] The stitched felt of the present application can be made of waste basalt fiber, basalt fiber, or a mixture of waste basalt fiber and basalt fiber. The applicant has verified through practice that even if all waste basalt fibers are used, the uniformity and strength of the stitched felt can meet the requirements.

[0013] In order to further improve the uniformity of the stitch-bonded felt, the waste basalt fibers and / or basalt fibers are cut into lengths of 3 to 8 cm.

[0014] A stitch-bonded felt preparation device using waste basalt fiber comprises a short cutter, a uniform web forming machine, an air-flow web forming machine, a stitch-bonding machine and a winding machine which are connected in sequence;

[0015] The uniform web-forming machine comprises a web-forming chamber, in which a first conveying curtain, a conveying corner nail curtain and a second conveying curtain connected in sequence are installed; the conveying corner nail curtain is driven by three transmission rollers to form a circular transmission, and the conveying corner nail curtain is in a triangular ring shape, and the three sides constituting the triangular ring shape are the first corner nail curtain, the second corner nail curtain and the third corner nail curtain in sequence, the first corner nail curtain is an oblique upward structure from the starting end to the end, and the second corner nail curtain is an oblique downward structure from the starting end to the end, the end of the second corner nail curtain is located directly above the second conveying curtain, and the height difference between the end of the second corner nail curtain and the second conveying curtain is not less than 60 cm; the end of the second corner nail curtain A stripping roller is arranged opposite to the first corner nail curtain, and four rows of stripping nails are evenly distributed on the surface of the stripping roller along the circumferential direction. When the stripping roller rotates, the stripping nails will knock the materials on the second corner nail curtain onto the second conveying curtain. A first pressing roller and a material leveling roller are installed in sequence from upstream to downstream opposite to the first corner nail curtain. Four rows of material leveling nails are arranged on the surface of the material leveling roller along the circumferential direction. When the material leveling roller rotates counterclockwise, the material leveling nails homogenize the waste basalt fibers and / or basalt fibers on the first corner nail curtain. The short cut machine is connected to the starting end of the first conveying curtain, the end of the first conveying curtain is connected to the starting end of the first corner nail curtain, and the end of the second conveying curtain is connected to the airflow laminating machine.

[0016] The height difference between the end of the second corner nail curtain and the second conveying curtain is set to facilitate the fibers to form a uniform arrangement without directional cross in the blanking process, which can better ensure the uniformity of the fibers; the first corner nail curtain runs obliquely upward, the material leveling roller rotates counterclockwise, and the material leveling nails on the material leveling roller have a homogenizing effect on the waste basalt fibers and / or basalt fibers on the first corner nail curtain; the setting of the first pressing roller can have a homogenizing effect on the material thickness on the oblique first corner nail curtain.

[0017] Of course, there is no strict restriction on the location setting of the short-cut machine. The cut materials can also be packaged first and transported to the designated place as needed when needed. Then the short-cut materials are sequentially passed through the uniform web forming machine, the air web forming machine and the stitching machine to prepare the stitched felt.

[0018] The installation methods of various rollers in the present application and the installation of motors etc. required for operation are all based on the prior art.

[0019] The motor for conveying corner nail curtain adopts frequency conversion control, and the speed of corner nail curtain can be adjusted according to actual production needs.

[0020] In order to achieve a better homogenization effect on the waste basalt fiber, the angle between the corner nails on the above-mentioned conveying corner nail curtain and the plane where the conveying corner nail curtain is located is 45°. The corner nails on the first corner nail curtain are set obliquely upward, and the angle between the corner nails and the vertical direction is 20-40°. The corner nails of the second corner nail curtain are set obliquely downward, and the angle between the corner nails and the vertical direction is 60-85°. The conveying corner nail curtain is divided into the first corner nail curtain, the second corner nail curtain and the third corner nail curtain for the convenience of description. They are essentially a whole and form a circular transmission. The setting direction and angle of the glue nails on each corner nail curtain can be achieved by adjusting the position of the three transmission rollers.

[0021] In order to further ensure the uniformity of material distribution, the corner nails on the conveying corner nail curtain are arranged in more than two rows along the transmission direction, and the two adjacent rows of corner nails are staggered. The spacing between two adjacent rows of corner nails is 2 to 4 cm, and the spacing between the corner nails in the same row is 2 to 3 cm. The length of the corner nails is 3 to 4 cm.

[0022] In order to further improve the homogenization effect, two material-leveling rollers with the same structure are arranged in sequence from upstream to downstream directly opposite to the first corner nail curtain; a second pressure roller is arranged directly above the second conveying curtain, and a reticulated knurling is arranged on the surface of the second pressure roller.

[0023] The height of the second pressing roller is adjustable, which is convenient for the production of stitched felts of different specifications. The second pressing roller puts the fed fibers in a holding state to improve the uniformity of the web. The surface of the pressing roller is knurled to improve the friction without sticking to the fibers. The second pressing roller is synchronously driven with the second conveying curtain.

[0024] In order to reduce material loss and production pollution, a material drop channel is provided between the end of the second corner nail curtain and the second conveying curtain. The material on the second corner nail curtain falls onto the second conveying curtain along the material drop channel.

[0025] In order to improve the uniformity of web formation, preferably, the length of the stripping pins on the stripping roller is 6 to 8 cm; the length of the leveling pins on the leveling roller is 5 to 6 cm.

[0026] In order to further homogenize the fibers, the airflow web-forming machine includes a frame, on which are arranged a third conveying curtain, a feeding roller, a main cylinder, a material-uniform chamber, a wind roller and a fourth conveying curtain which are connected in sequence, the wind roller including a suction chamber and a dust cage arranged on the periphery of the suction chamber, and a sealing pressure roller is arranged directly above the dust cage; a feed port is arranged at one end of the material-uniform chamber and a discharge port is arranged at the other end, and the feed port of the material-uniform chamber is higher than the discharge port, the feed port of the material-uniform chamber is connected to the distance between the feeding roller and the main cylinder, and the discharge port of the material-uniform chamber is connected to the gap between the wind roller and the sealing pressure roller; an air outlet is arranged on the side of the suction chamber of the wind roller facing the material-uniform chamber, and the suction chamber is connected to a suction fan to provide air volume for the material-uniform chamber; the end of the second conveying curtain of the uniform web-forming machine is connected to the beginning of the third conveying curtain, and the end of the fourth conveying curtain is connected to the sewing machine.

[0027] The suction fan provides airflow to the material distribution chamber through the air outlet on the suction chamber, so that there is enough air in the material distribution chamber to contain each fiber during the transportation process, so that the fibers are not entangled with each other; the airflow mainly plays the role of conveying, diffusing, and non-directional cross-arrangement of the fibers. During the transmission process, the dust cage outside the suction chamber of the wind roller rotates, thereby conveying the material at the same time.

[0028] The above-mentioned air-laying machine feed is a steel roller structure.

[0029] In order to improve the uniformity of air volume, the length direction of the air outlet is consistent with the axial direction of the wind roller. The width of the air outlet is adapted to the width of the discharge port of the material distribution chamber to better ensure the uniformity of material distribution.

[0030] In order to further improve the uniformity of the fibers, the material distribution chamber is in the shape of a trumpet that gradually expands from top to bottom, that is, the material distribution chamber is in the shape of a trumpet that gradually expands from the feed inlet to the discharge outlet; the top surface of the material distribution chamber is in the shape of a concave bow, which can reduce the airflow force and facilitate uniform fiber adsorption.

[0031] In order to further ensure the uniformity of the fibers, preferably, the suction air volume of the suction fan is 10314 to 17692 m3 / h.

[0032] In order to further improve the uniformity of fiber mixing, the mesh diameter on the dust cage is 3±0.1mm, the distance between two adjacent meshes is 9-11mm, and the air flow speed in the mesh is 2-3m / s.

[0033] In this application, directional words such as up and down, left and right, top, and bottom all refer to the relative positions of devices in normal use. The direction from upstream to downstream is also the direction of material flow, and is also the direction from the beginning to the end of each device.

[0034] The technologies not mentioned in the present invention are all referred to the prior art.

[0035] The stitched felt made of waste basalt fibers in the present invention has good uniformity and high strength, and can be used for wind power generation, ships, automobiles, high-speed trains, sports equipment, protection, construction, etc.; the device for making stitched felt in the present application can evenly disperse and web the waste basalt fibers, thereby solving the problems of easy agglomeration, difficult dispersion, and poor uniformity of the waste basalt fibers, so that the waste basalt fibers can also be effectively utilized, saving resources, reducing energy consumption, and reducing costs, thus truly turning waste into treasure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a stitched felt preparation device using waste basalt fibers according to the present invention;

[0037] Figure 2It is a structural schematic diagram of a uniform web-forming machine of the present invention;

[0038] Figure 3 It is a schematic diagram of the structure of the air-laid machine of the present invention;

[0039] Figure 4 for Figure 3 An enlarged schematic diagram of the feeding roller and the main cylinder on the medium air-laid machine;

[0040] In the figure, 1 is a uniform web-forming machine, 11 is a first conveying curtain, 12 is a conveying corner nail curtain, 121 is a first corner nail curtain, 122 is a second corner nail curtain, 123 is a third corner nail curtain, 13 is a second conveying curtain, 14 is a first pressure roller, 15 is a material distribution roller, 16 is a stripping roller, 17 is a material dropping channel, 18 is a second pressure roller, 19 is a web-forming chamber, 2 is an airflow web-forming machine, 21 is a third conveying curtain, 22 is a feeding roller, 23 is a main cylinder, 24 is a material distribution chamber, 241 is the top surface of the material distribution chamber, 25 is a wind roller, 251 is a suction chamber, 252 is a dust cage, 26 is a fourth conveying curtain, 27 is a suction fan, 28 is a sealing pressure roller, 29 is a frame, 3 is a sewing machine, and 4 is a winding machine. DETAILED DESCRIPTION

[0041] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0042] like Figure 1 As shown, a stitch-bonded felt preparation device using waste basalt fibers comprises a short cutter, a uniform web forming machine, an air-laying machine, a stitch-bonding machine and a winding machine which are connected in sequence;

[0043] like Figure 2As shown, the uniform web-forming machine includes a web-forming chamber, in which a first conveying curtain, a conveying corner nail curtain and a second conveying curtain connected in sequence are installed; the conveying corner nail curtain is driven by three transmission rollers to form a circular transmission, and the conveying corner nail curtain is in a triangular ring shape, and the three sides constituting the triangular ring shape are the first corner nail curtain, the second corner nail curtain and the third corner nail curtain in sequence, the first corner nail curtain is an oblique upward structure from the starting end to the end, and the second corner nail curtain is an oblique downward structure from the starting end to the end, the end of the second corner nail curtain is located directly above the second conveying curtain, and the height difference between the end of the second corner nail curtain and the second conveying curtain is not less than 60cm, and a material dropping channel is provided between the end of the second corner nail curtain and the second conveying curtain; a stripping roller is provided directly opposite to the end of the second corner nail curtain, and four rows of stripping nails are evenly distributed on the surface of the stripping roller along the circumferential direction, and the stripping nails on the stripping roller are used to The materials on the second corner nail curtain are knocked down onto the second conveying curtain; directly opposite to the first corner nail curtain, a first pressing roller and two material balancing rollers are sequentially installed from upstream to downstream, and four rows of material balancing nails are arranged on the surface of the material balancing roller along the circumference. When the material balancing roller rotates counterclockwise, the material balancing nails on the material balancing roller play a role in homogenizing the waste basalt fiber and / or basalt fiber on the first corner nail curtain; directly above the second conveying curtain, a second pressing roller is arranged, and the surface of the second pressing roller is provided with anvil knurling. The height of the second pressing roller is adjustable, so that the fed fiber is in a holding state, and the uniformity of the web is improved. The surface of the pressing roller is knurled to improve the friction force without sticking to the fiber. The pressing roller and the second conveying curtain are synchronously driven; the short cut machine is connected to the starting end of the first conveying curtain, the end of the first conveying curtain is connected to the starting end of the first corner nail curtain, and the end of the second conveying curtain is connected to the airflow web forming machine;

[0044] The angle between the corner nails on the conveying corner nail curtain and the plane where the conveying corner nail curtain is located is 45°; the corner nails on the first corner nail curtain are set obliquely upward, and the angle between the corner nails and the vertical direction is 25°, and the corner nails of the second corner nail curtain are set obliquely downward, and the angle between the corner nails and the vertical direction is 80°; the conveying corner nail curtain is divided into the first corner nail curtain, the second corner nail curtain and the third corner nail curtain for the convenience of description. It is essentially a whole and forms a circular transmission. The conveying corner nail curtain motor adopts frequency conversion control, and the speed of the corner nail curtain can be adjusted according to actual production needs. The setting direction and angle of the corner nails on each corner nail curtain can be achieved by adjusting the position of the three transmission rollers.

[0045] There are more than two rows of corner nails on the conveying corner nail curtain along the conveying direction, and the corner nails in two adjacent rows are staggered. The spacing between two adjacent rows of corner nails is 3cm, and the spacing between the corner nails in the same row is 2.5cm. The length of the corner nails is 3.5cm. The corner nails are steel nails with the tip facing upward. The length of the stripping nail on the stripping roller is 7cm; the length of the equalizing nail on the equalizing roller is 6cm.

[0046] like Figure 3-4As shown, the air-laying machine includes a frame, on which are arranged a third conveying curtain, a feeding roller, a main cylinder, a material-distributing chamber, a wind roller and a fourth conveying curtain which are connected in sequence; the frame is a 40mm steel plate welded structure; the wind roller includes a suction chamber and a dust cage arranged on the periphery of the suction chamber, and a sealing pressure roller is arranged directly above the dust cage; a feeding port is arranged at one end of the material-distributing chamber and a discharging port is arranged at the other end, and the feeding port of the material-distributing chamber is higher than the discharging port, the feeding port of the material-distributing chamber is connected to the spacing between the feeding roller and the main cylinder, and the discharging port of the material-distributing chamber is connected to the gap between the wind roller and the sealing pressure roller, and the material-distributing chamber is gradually expanded from top to bottom. Trumpet shape; the top surface of the material-distributing chamber is in a concave bow shape, which reduces the impact of the airflow and is conducive to uniform adsorption of fibers; an air outlet is provided on the side of the suction chamber of the wind roller facing the material-distributing chamber, and the length direction of the air outlet is consistent with the axial direction of the wind roller. The suction chamber is connected with the suction fan to provide an air volume of 10314-17692m3 / h in the material-distributing chamber; the mesh diameter of the dust cage is 3mm, the spacing between adjacent meshes is 10mm, and the airflow speed in the mesh is 2-3m / s; the end of the second conveying curtain of the uniform web-forming machine is connected to the beginning of the third conveying curtain, and the end of the fourth conveying curtain is connected to the sewing machine.

[0047] The suction fan provides airflow to the material distribution chamber through the air outlet on the suction chamber, so that there is enough air in the material distribution chamber to contain each fiber during the transportation process, so that the fibers are not entangled with each other; the airflow mainly plays the role of conveying, diffusing, and non-directional cross-arrangement of the fibers. During the transmission process, the dust cage outside the suction chamber of the wind roller rotates, thereby conveying the material at the same time.

[0048] Note: The figure does not show a short cutter, and there is no strict restriction on the location of the short cutter. The cut materials can also be packaged first and transported to designated places as needed when needed. The chopped materials are sequentially passed through a uniform web forming machine, an airflow web forming machine and a stitching machine to prepare a stitched felt.

[0049] The stitched felt preparation device using waste basalt fiber is used to produce stitched felt: waste basalt fiber (source: industrial tailings generated in basalt fiber production, with a diameter of 8-12 μm) is cut into a length of about 5 cm by a short cutter; the chopped waste basalt fiber enters a uniform web forming machine, and is transported to a conveying angle nail curtain through a first conveying curtain. After the first angle nail curtain is rolled by a first pressure roller and evenly distributed by two material distribution rollers, it enters a second angle nail curtain, is stripped by a stripping roller, and falls on a second conveying curtain after passing through a material drop channel, and is transported to an air filter by the second conveying curtain. The waste basalt fibers are fed into the material-distributing chamber through the third conveying curtain of the flow-forming machine and then fed through the feeding roller. The waste basalt fibers are randomly and cross-arranged on the dust cage of the wind roller under the action of the airflow in the material-distributing chamber and output to the fourth conveying curtain. The fibers are then transported to the sewing machine by the fourth conveying curtain. The yarn used in the sewing machine is a polyester yarn with a diameter of 100D. The yarn is then wound at a fixed length by the winding machine to obtain a sewing felt made of waste basalt fibers, including a basalt fiber layer and yarn sewing the basalt fiber layer into a whole. The basalt fiber layer is formed by evenly laying the waste basalt fibers.

[0050] The above-mentioned stitched felt preparation device using waste basalt fiber has a production capacity of 800 tons / year (based on 300g / m 2 ); Product width: 2500 mm; Product specifications: 300, 380, 450, 550, 600 or 800 g / m 2 ; Uniformity: The average weight deviation of different specifications is less than 1.2%, flat and without loose threads; Winding method: fixed length method.

[0051] Table 1 Performance of stitched felt made from waste basalt fiber

[0052] <![CDATA[Grammage g / m 2 > 300 380 450 550 600 800 Thickness mm 2 3 3.5 4 5 6 <![CDATA[Needle punching density needles / m 2 > 784 784 784 784 784 784 <![CDATA[Air volume in the material leveling chamber m 3 / h]]> 14051 14569 15463 16003 16536 17692 Tensile strength MPa 623 652 689 720 742 806 Conductivity W / mk 0.04 0.04 0.04 0.04 0.04 0.04

[0053] From the above table, it can be seen that the stitched felt made of waste basalt fiber in this application is light, flat, free of filaments, high in strength, and has adjustable specifications. It does not deform under the action of a 1000°C flame and is fire-resistant for more than 1 hour. It is resistant to high temperatures, has low shrinkage, small heat energy loss, low thermal conductivity, good thermal insulation effect, good acid and alkali resistance, low moisture absorption, radiation resistance, UV resistance, and biological pollution resistance. As a new substrate, it can be used in wind power generation, ships, automobiles, high-speed trains, sporting goods, protection, construction and other fields.

Claims

1. A method for making stitched felt using waste basalt fibers, characterized in that: The waste basalt fibers are cut into short pieces, first homogenized into a web by a uniform web forming machine, then evenly distributed in an air-laid web forming machine, and then sewn with polyester yarn to obtain basalt sewn felt; The basalt stitched felt comprises a basalt fiber layer and a yarn stitching the basalt fiber layer into a whole, wherein the basalt fiber layer is formed by evenly laying waste basalt fibers; the waste basalt fibers have a length of 3 to 8 cm and a diameter of 5 to 14 μm; the yarn is a polyester yarn, and the diameter of the polyester yarn is 50 to 150D; A stitch-bonded felt preparation device using waste basalt fiber comprises a short cutter, a uniform web forming machine, an air-bonding machine, a stitch-bonding machine and a winding machine which are connected in sequence; The airflow web-forming machine comprises a frame, on which a third conveying curtain, a feeding roller, a main cylinder, a material-distributing chamber, a wind roller and a fourth conveying curtain connected in sequence are arranged, the wind roller comprises a suction chamber and a dust cage arranged on the periphery of the suction chamber, and a sealing pressure roller is arranged directly above the dust cage; a feeding port is arranged at one end of the material-distributing chamber and a discharging port is arranged at the other end, and the feeding port of the material-distributing chamber is higher than the discharging port, the feeding port of the material-distributing chamber is connected to the spacing between the feeding roller and the main cylinder, and the discharging port of the material-distributing chamber is connected to the gap between the wind roller and the sealing pressure roller; an air outlet is arranged on the side of the suction chamber of the wind roller facing the material-distributing chamber, and a suction fan is connected to the suction chamber to provide air volume for the material-distributing chamber; the end of the uniform web-forming machine is connected to the starting end of the third conveying curtain, and the end of the fourth conveying curtain is connected to the stitching machine; The length direction of the air outlet is consistent with the axial direction of the wind roller; the material distribution chamber is a trumpet shape that gradually expands from top to bottom; the top surface of the material distribution chamber is a concave bow shape; the suction air volume of the suction fan is 10314~17692m 3 / h; the mesh diameter of the dust cage is 3±0.1mm, the distance between two adjacent meshes is 9-11mm, and the air flow speed in the mesh is 2-3m / s; The needle punching density of the yarn is 500 to 900 needles / m 2 ; The thickness of the stitched felt is 2-6 mm and the weight is 300-800 g / m 2 ; The uniform web forming machine comprises a web forming chamber, in which a first conveying curtain, a conveying corner nail curtain and a second conveying curtain connected in sequence are installed; the conveying corner nail curtain is driven by three transmission rollers to form a circular transmission, and the conveying corner nail curtain is in a triangular ring shape, and the three sides constituting the triangular ring shape are the first corner nail curtain, the second corner nail curtain and the third corner nail curtain in sequence, the first corner nail curtain is an oblique upward structure from the starting end to the end, the second corner nail curtain is an oblique downward structure from the starting end to the end, the end of the second corner nail curtain is located directly above the second conveying curtain, and the height difference between the end of the second corner nail curtain and the second conveying curtain is not small 60cm; a stripping roller is provided opposite to the end of the second corner nail curtain, and four rows of stripping nails are evenly distributed on the surface of the stripping roller along the circumference, and the materials on the second corner nail curtain are knocked down onto the second conveying curtain by the stripping nails on the stripping roller; a first pressing roller and a material balancing roller are installed in sequence from upstream to downstream opposite to the first corner nail curtain, and four rows of material balancing nails are provided on the surface of the material balancing roller along the circumference, and the material balancing roller rotates counterclockwise; the short cut machine is connected to the starting end of the first conveying curtain, the end of the first conveying curtain is connected to the starting end of the first corner nail curtain, and the end of the second conveying curtain is connected to the starting end of the third conveying curtain on the air-laid machine; The corner nails on the first corner nail curtain are arranged obliquely upward, and the angle between the corner nails and the vertical direction is 20-40 degrees, and the corner nails on the second corner nail curtain are arranged obliquely downward, and the angle between the corner nails and the vertical direction is 60-85 degrees; There are more than two rows of corner nails on the conveying corner nail curtain along the conveying direction, and the corner nails in two adjacent rows are staggered. The spacing between two adjacent rows of corner nails is 2 to 4 cm, and the spacing between the corner nails in the same row is 2 to 3 cm. The length of the corner nails is 3 to 4 cm. Directly opposite the first corner nail curtain, two material equalizing rollers with the same structure are arranged in sequence from upstream to downstream; a second pressure roller is arranged directly above the second conveying curtain, and the surface of the second pressure roller is provided with a mesh knurling; the length of the stripping nails on the stripping roller is 6 to 8 cm; the length of the material equalizing nails on the material equalizing roller is 5 to 6 cm; a material dropping channel is arranged between the end of the second corner nail curtain and the second conveying curtain.

Images