Airflow web former for uniform web forming

Abstract

The utility model discloses an airflow web former for uniformly forming a web, and belongs to the field of web forming equipment. A web forming unit of the air flow web forming machine comprises a circulating conveying curtain, the circulating conveying curtain comprises a first inclined part, a second conveying part and a third recycling part which are sequentially and continuously arranged in a closed mode, the first inclined part is obliquely arranged from bottom to top, and the second conveying part is located above the third recycling part; a circulating conveying roller is arranged at the corner between the first inclined part and the second conveying part, the corner between the second conveying part and the third recycling part, and the corner between the third recycling part and the first inclined part respectively; an air outlet of the air blowing assembly faces the first inclined part; and the air draft assembly is positioned in the circulating conveying curtain. By means of the zoning arrangement of the circulating conveying curtain, it is guaranteed that materials with different weights are temporarily stored in the first inclined part in the initial stage of air laying, air blows the materials all the time, the phenomenon that heavy materials sink is avoided, the uniformity of the net-shaped materials is improved, and the air laying device is particularly suitable for multi-component air laying of horsetail hair.

Description

Technical Field

[0001] The utility model relates to the field of airflow web-forming equipment, in particular to an airflow web-forming machine for uniform web-forming. Background Art

[0002] Airflow forming is a process that uses airflow to separate the combed fibers from the combing components to form a fiber web. The basic method is to use airflow to peel off the combed fibers under the centrifugal force of the combing components (blowing, sucking, or both), so that the dispersed single fibers pass through an air duct, diffuse and slow down due to airflow, and gradually settle on a roller or mesh curtain with small holes to form a fiber web. The characteristics are that the fibers in the fiber web are randomly arranged, the mechanical properties of the fiber web in all directions are relatively close, the thickness of the fiber web is easy to adjust, and the web laying process is omitted. There are many types of processable raw materials, including many raw materials that are not suitable for spinning on the carding machine, such as short fibers, metal fibers, glass fibers, duck feathers, goose feathers, wood fibers, straw, etc.

[0003] However, the fiber components of felt or mats are complex, generally including cotton, linen, chemical fiber, cow hair, wool, horsetail hair, etc. The weights of these materials are different. When using the air-laid process, due to the difference in weight, uneven distribution is likely to occur in the subsequent transportation process, resulting in stratification of the product and ultimately the appearance of defective products. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an airflow web-forming machine for uniform web formation.

[0005] The technical solution of the utility model is: an air-laid machine for uniformly forming a web, comprising:

[0006] frame,

[0007] A cotton box is arranged on the frame, the cotton box is communicated with the inlet of an opening unit arranged on the frame, and a net unit is arranged at the outlet of the opening unit;

[0008] The web forming unit arranged on the frame comprises:

[0009] A circulating conveying curtain, wherein the circulating conveying curtain comprises a first inclined portion, a second conveying portion, and a third recovery portion which are arranged in sequence and in a closed manner, wherein the first inclined portion is arranged obliquely from bottom to top, and the second conveying portion is located above the third recovery portion;

[0010] Circulating conveying rollers, which are rotatably arranged on the frame, and one circulating conveying roller is arranged at the corners between the first inclined portion and the second conveying portion, the second conveying portion and the third recovery portion, and the third recovery portion and the first inclined portion respectively;

[0011] A blowing assembly, wherein the air outlet of the blowing assembly faces the first inclined portion;

[0012] An exhaust component, wherein the air suction port of the exhaust component is located in the circulating conveying curtain.

[0013] Furthermore, the conveying direction of the circulating conveying curtain is the first inclined portion, the second conveying portion, the third recovery portion, and the first inclined portion. The whole is closed and continuously arranged, and at least one circulating conveying roller is driven by a motor, and the other rollers are linked by synchronous belts.

[0014] Furthermore, the inclination angle of the first inclined portion is 10-60 degrees, and the optimal angle is between 30-45 degrees.

[0015] Furthermore, the second conveying portion is horizontally arranged, and the second conveying portion is located above the third recovery portion.

[0016] Furthermore, at least one expansion conveying roller is arranged in the third recovery part to expand the third recovery part outward. The circulating conveying curtain is arranged in a quadrilateral, pentagon or polygon, so that the internal space becomes larger, which is convenient for the arrangement of the exhaust component.

[0017] Furthermore, at least one tensioning roller is arranged on the outer side of the circulating conveying curtain. The arrangement of the tensioning roller enables the circulating conveying curtain to maintain a tensioned state during the conveying process.

[0018] Furthermore, the blowing assembly comprises:

[0019] A fan arranged on a frame;

[0020] An air outlet channel is connected to the fan through an air inlet duct, and the air outlet channel is evenly distributed along the width direction of the circulating conveying curtain. The end of the air outlet channel is an air outlet.

[0021] Furthermore, the end of the air outlet channel is an air outlet, and the air outlet direction of the air outlet is arranged perpendicular to the first inclined portion.

[0022] Furthermore, one air inlet duct is connected to at least two of the air outlet channels, and the air outlet channels are arranged in a curved manner, generally in an arc shape, so as to ensure uniform air outlet.

[0023] Furthermore, the blowing components are distributed in two groups in a mirror-symmetrical manner, which ensures stable airflow netting along the width direction of the circulating conveying curtain.

[0024] Furthermore, a uniform air duct may be provided at the air outlet of the fan, and the uniform air duct includes:

[0025] An air inlet section, the air inlet section being connected to an air outlet end of the fan;

[0026] A mixing section, the mixing section is connected to the air inlet section, and a mixing roller is fixedly arranged in the mixing section, the mixing roller is arranged in at least two layers, and the mixing rollers between two adjacent layers are staggered and arranged; and

[0027] The air outlet section is connected with the mixing section, the air outlet section is arranged in an arc-shaped reduced diameter, an adjusting roller is eccentrically arranged at the air outlet of the air outlet section, and the adjusting roller blocks the air outlet.

[0028] Furthermore, the air inlet section includes a return air section, and the air from the fan enters the return air section and then enters the mixing section.

[0029] Furthermore, the air inlet section is 50 in length and 30 in height; the mixing section is 17 in length. The data here are only for proportional indication. The return air section is 33 in length.

[0030] Furthermore, the distance of the air outlet section after the diameter is reduced is 5. That is, it can be considered that the diameter is reduced from 17 to 5, and the air duct becomes smaller. When the wind pressure of the fan is 310, the wind pressure after the diameter is reduced reaches 550-560, which can effectively increase the pressure, and the wind force is stably output, and when the roller is tested in the axial direction, the wind force at each position is uniform.

[0031] Furthermore, the air outlet of the air outlet section is horizontally arranged, and the distance between them is 5, an eccentric roller is arranged on the lower side of the air outlet, and the distance between the upper side of the eccentric roller and the upper side of the air outlet is 2-5.

[0032] Furthermore, the diameter of the eccentric roller is 3.

[0033] Furthermore, the mixing rollers are arranged in three layers, and from bottom to top they are the first layer, the second layer and the third layer respectively, the first layer is arranged with two mixing rollers, the second layer is arranged with three mixing rollers, the third layer is arranged with two mixing rollers, and the two adjacent layers are staggered and crossed.

[0034] Furthermore, the diameter of the mixing roller is 3, the spacing between the three mixing rollers arranged in the second layer is 2, and the spacing between the two sides and the inner wall of the mixing section is 2, the first layer and the third layer are each provided with two mixing rollers, and the vertical height difference between the centers of the mixing rollers between two adjacent layers is 3.5. The distance here is only for illustration and does not represent the specific length. Generally speaking, when the mixing roller is purchased, its diameter is known and can be converted according to its actual length.

[0035] Furthermore, the eccentric roller is driven by an eccentric drive motor, which can generally be set by a servo motor.

[0036] Furthermore, the exhaust assembly includes: a suction machine arranged on a frame; and an air suction channel connected to the suction machine through an exhaust duct.

[0037] Furthermore, a dust cage is rotatably arranged on the upper side of the second conveying portion, and the dust cage presses the product on the second conveying portion.

[0038] Furthermore, a cover is provided outside the dust cage, and a negative pressure channel is provided on the cover, that is, negative pressure treatment is applied to the product from the upper layer of the product to ensure timely removal of air inside the product, and the outer diameter of the dust cage is matched with the inner wall of the cover.

[0039] Furthermore, at least two negative pressure channels are provided and arranged along the width direction of the circulating conveying curtain, and the negative pressure channels are arranged in an arc shape.

[0040] Furthermore, a support roller is rotatably arranged at the lower side of the second conveying part, and the support roller is located below the dust cage, that is, the dust cage is guaranteed to process the air-laid product, remove the internal air, and ensure the molding quality and effect.

[0041] Furthermore, the cotton box is arranged vertically, a cotton inlet channel is arranged above the cotton box, and a cotton outlet channel is arranged at the lower end of the cotton box.

[0042] Furthermore, the opening unit comprises: an opening box, an opening roller is rotatably arranged in the opening box, an opening channel is formed between the opening roller and the inner wall of the opening box, the cotton inlet of the opening channel is connected to the cotton box, and the cotton outlet of the opening channel faces the first inclined portion. That is, after the material is opened by the opening unit, it is air-laid through the web-forming unit.

[0043] Furthermore, the opening unit is located above the web forming unit, and a metal plate is arranged between the cotton outlet of the opening unit and the web forming unit, one side of the metal plate is a blowing assembly, and the other side of the metal plate is arranged in cooperation with the first inclined portion, so as to ensure that the products are blown by the airflow above the metal plate and accumulated on the first inclined portion.

[0044] Furthermore, the surface of the opening roller is provided with opening thorns, which further ensures the opening effect.

[0045] Furthermore, at least one depilatory roller is arranged in the opening channel.

[0046] Furthermore, at least one working roller is arranged in the opening channel.

[0047] Generally speaking, the stripping rollers and the working rollers are arranged in groups in a one-to-one correspondence.

[0048] Furthermore, the opening channel is arranged in an arc shape, and the angle of the arc is greater than 180 degrees, so as to ensure that the material is fully opened and the uniformity of the air-laid web is guaranteed.

[0049] Furthermore, a stripping sheet is fixedly arranged on the opening box at the cotton outlet of the opening channel, and the stripping sheet is arranged parallel to the axial direction of the opening roller, and the stripping sheet is close to the opening roller and separates the opened material from the opening roller, so as to ensure that the opened material enters the web forming part.

[0050] Furthermore, the stripping sheet is a stripping blade, and the blade faces the cotton outlet, so as to ensure a thorough separation.

[0051] The beneficial technical effect of the utility model is that through the zoning setting of the circulating conveying curtain, it is ensured that in the early stage of airflow web forming, materials of different weights are temporarily stored in the first inclined part, and the wind always blows the materials, avoiding the phenomenon of heavier materials sinking, and improving the uniformity of the mesh material. It is particularly suitable for multi-component airflow web forming of horsetail hair. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is an overall schematic diagram of an air-laid machine for uniform web formation.

[0053] Figure 2 It is a working schematic diagram of the opening unit and the web forming unit.

[0054] Figure 3 It is a working schematic diagram of the web-forming unit.

[0055] Figure 4 It is a schematic diagram of loosening the thorns.

[0056] Figure 5 It is a schematic diagram of the air outlet duct.

[0057] Figure 6 It is an overall schematic diagram of a uniform air blowing mechanism for an air-laid machine.

[0058] Figure 7 is a schematic diagram of the mixing section.

[0059] in:

[0060] 1. Frame, 2. Cotton box,

[0061] 3. Opening unit, 31. Opening box, 32. Opening roller, 33. Opening channel, 34. Metal plate, 35. Opening barb, 36. Stripping roller, 37. Working roller, 38. Stripping sheet,

[0062] 4. Web forming unit,

[0063] 41. Circular conveying curtain, 411. First inclined portion, 412. Second conveying portion, 413. Third recovery portion,

[0064] 42. Circular conveyor roller,

[0065] 43. Blowing assembly, 431. Fan, 432. Air outlet channel,

[0066] 44. exhaust assembly, 441. suction machine, 442. suction channel,

[0067] 45. expansion conveying roller, 46. tensioning roller, 47. dust cage, 48. cover shell, 49. negative pressure channel, 410. supporting roller;

[0068] 5. Uniform air duct, 51. Air inlet section, 511. Return air section, 52. Mixing section, 53. Air outlet section, 54. Mixing roller, 55. Adjusting roller. DETAILED DESCRIPTION

[0069] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0070] See attached Figure 1-7 The airflow web-forming machine for uniform web formation shown in the figure comprises: a frame 1, a cotton box 2 is arranged on the frame 1, the cotton box 2 is connected to the inlet of an opening unit 3 arranged on the frame 1, and a web-forming unit 4 is arranged at the outlet of the opening unit 3.

[0071] Further, the web forming unit 4 comprises:

[0072] The circulating conveying curtain 41 includes a first inclined portion 411, a second conveying portion 412, and a third recovery portion 413 which are arranged in sequence and in a closed manner, and the first inclined portion 411 is arranged to be inclined from bottom to top, and the second conveying portion 412 is located above the third recovery portion 413;

[0073] Circular conveying rollers 42, which are rotatably arranged on the frame 1, and are respectively arranged at the corners between the first inclined portion 411 and the second conveying portion 412, the second conveying portion 412 and the third recovery portion 413, and the third recovery portion 413 and the first inclined portion 411;

[0074] A blowing assembly 43, wherein the air outlet of the blowing assembly 43 faces the first inclined portion 411;

[0075] The exhaust component 44 has an air suction port located inside the circulating conveying curtain 41 .

[0076] Further, the conveying direction of the circulating conveying curtain 41 is the first inclined portion 411, the second conveying portion 412, the third recovery portion 413, and the first inclined portion 411. The whole is closed and continuously arranged, and at least one circulating conveying roller 42 is driven by a motor, and the other rollers are linked by synchronous belts.

[0077] Furthermore, the inclination angle of the first inclined portion 411 is 10-60 degrees, and the optimal angle is between 30-45 degrees.

[0078] Furthermore, the second conveying portion 412 is horizontally disposed, and the second conveying portion 412 is located above the third recovery portion 413 .

[0079] Further, at least one expansion conveying roller 45 for expanding the third recycling part 413 outward is provided in the third recycling part 413. The circulating conveying curtain 41 is arranged in a quadrilateral, pentagon or polygon, so that the internal space becomes larger, and the arrangement of the exhaust component 44 is convenient.

[0080] Furthermore, at least one tensioning roller 46 is provided on the outer side of the circulating conveying curtain 41. The provision of the tensioning roller 46 enables the circulating conveying curtain 41 to maintain a tensioned state during the conveying process.

[0081] Further, the blowing assembly 43 includes:

[0082] A fan 431 is arranged on the rack 1;

[0083] The air outlet channel 432 is connected to the fan 431 through the air inlet duct, and the air outlet channel 432 is evenly distributed along the width direction of the circulating conveying curtain 41. The end of the air outlet channel 432 is an air outlet.

[0084] Furthermore, an end of the air outlet channel 432 is an air outlet, and the air outlet direction of the air outlet is perpendicular to the first inclined portion 411 .

[0085] Furthermore, one air inlet duct is connected to at least two air outlet channels 432, and the air outlet channels 432 are arranged in a curved manner. Generally, they are arranged in an arc shape to ensure uniform air outlet.

[0086] Furthermore, the blowing components 43 are distributed in two groups in a mirror-symmetrical manner, which ensures that the airflow forms a web stably along the width direction of the circulating conveying curtain 41 .

[0087] Furthermore, the air extraction assembly 44 includes: a suction machine 441 disposed on the frame 1; and an air suction channel 442 connected to the suction machine 441 through an air extraction duct.

[0088] Furthermore, a dust cage 47 is rotatably disposed on the upper side of the second conveying portion 412 , and the dust cage 47 presses the product on the second conveying portion 412 .

[0089] Furthermore, a cover 48 is provided outside the dust cage 47, and a negative pressure channel 49 is provided on the cover 48. That is, the product is subjected to negative pressure treatment from the upper layer of the product to ensure timely removal of the air inside the product, and the outer diameter of the dust cage 47 is matched with the inner wall of the cover 48.

[0090] Furthermore, at least two negative pressure channels 49 are provided and arranged along the width direction of the circulating conveying curtain 41 , and the negative pressure channels 49 are arranged in an arc shape.

[0091] Further, a support roller 410 is rotatably arranged at the lower side of the second conveying portion 412, and the support roller 410 is located below the dust cage 47. That is, the dust cage 47 is guaranteed to process the air-laid product, remove the internal air, and ensure the molding quality and effect.

[0092] Furthermore, the cotton box 2 is arranged vertically, a cotton inlet channel is arranged above the cotton box 2, and a cotton outlet channel is arranged at the lower end of the cotton box 2.

[0093] Further, the opening unit 3 comprises: an opening box 31, an opening roller 32 is rotatably arranged in the opening box 31, an opening channel 33 is formed between the opening roller 32 and the inner wall of the opening box 31, the cotton inlet of the opening channel 33 is connected to the cotton box 2, and the cotton outlet of the opening channel 33 faces the first inclined portion 411. That is, after the material is opened by the opening unit 3, it passes through the web forming unit 4 for airflow web formation.

[0094] Furthermore, the opening unit 3 is located above the web forming unit 4, and a metal plate 34 is provided between the cotton outlet of the opening unit 3 and the web forming unit 4, one side of the metal plate 34 is a blowing assembly 43, and the other side of the metal plate 34 is provided in cooperation with the first inclined portion 411. It is ensured that the product is blown by the airflow above the metal plate 34 and is accumulated on the first inclined portion 411.

[0095] Furthermore, the surface of the opening roller 32 is provided with opening thorns 35 to further ensure the opening effect.

[0096] Furthermore, at least one depilatory roller 36 is disposed in the opening channel 33 .

[0097] Furthermore, at least one working roller 37 is disposed in the opening channel 33 .

[0098] Generally speaking, the dehairing rollers 36 and the working rollers 37 are arranged in groups in a one-to-one correspondence.

[0099] Furthermore, the opening channel 33 is arranged in an arc shape, and the angle of the arc is greater than 180 degrees, so as to ensure that the material is fully opened and the uniformity of the air-laid web is guaranteed.

[0100] Furthermore, a stripping sheet 38 is fixedly arranged on the opening box 31 at the cotton outlet of the opening channel 33, and the stripping sheet 38 is arranged parallel to the axial direction of the opening roller 32. The stripping sheet 38 is close to the opening roller 32 and separates the opened material from the opening roller 32, so as to ensure that the opened material enters the web forming part.

[0101] Furthermore, the stripping sheet 38 is a stripping blade, and the blade faces the cotton outlet, so as to ensure a thorough separation.

[0102] By setting the circulating conveying curtain 41 in different zones, it is ensured that in the initial stage of airflow web formation, materials of different weights are temporarily stored in the first inclined portion 411, and the wind always blows the materials, thereby avoiding the phenomenon of heavier materials sinking and improving the uniformity of the mesh material, which is particularly suitable for multi-component airflow web formation of horsetail hair.

[0103] The basic usage process is as follows:

[0104] The cotton box is used to transport materials, and these materials are mixed in many ways, such as horsetail hair, cotton, wool, chemical fiber, two-component fiber, etc.

[0105] The opening unit loosens the material to prevent it from agglomerating;

[0106] The blowing component blows the loosened material to the first inclined portion, while the exhaust component sucks air from the inside, stably caching it in the first inclined portion until it is basically formed when it moves to the second conveying portion;

[0107] Then, under the extrusion and negative pressure of the dust cage, the quality of molding is guaranteed.

[0108] In another embodiment

[0109] A uniform air duct 5 is provided at the air outlet of the fan, and the uniform air duct 5 comprises:

[0110] An air inlet section 51, wherein the air inlet section 51 is connected to an air outlet end of the fan;

[0111] A mixing section 52, wherein the mixing section 52 is connected to the air inlet section 51, and a mixing roller 54 is fixedly arranged in the mixing section 52, wherein the mixing roller 54 is arranged in at least two layers, and the mixing rollers 54 between two adjacent layers are staggered and arranged; and

[0112] The air outlet section 53 is connected with the mixing section 52, and the air outlet section 53 is arranged in an arc-shaped reduced diameter. An adjusting roller 55 is eccentrically arranged at the air outlet of the air outlet section 53, and the adjusting roller 55 blocks the air outlet.

[0113] Furthermore, the air inlet section 51 includes a return air portion 511 , and the air from the fan enters the return air portion 511 and then enters the mixing section 52 .

[0114] Furthermore, the air inlet section 51 has a length of 50 and a height of 30; the length of the mixing section 52 is 17. The data here are only for proportional indication. The length of the return air section 511 is 33.

[0115] Furthermore, the distance of the air outlet section 53 after the diameter is reduced is 5. That is, it can be considered that the diameter of 17 is reduced to 5, and the air duct becomes smaller. When the wind pressure of the fan is 310, the wind pressure after the diameter is reduced reaches 550-560, which can effectively increase the pressure, and the wind force is stably output, and when the roller is tested in the axial direction, the wind force at each position is uniform.

[0116] Furthermore, the air outlet of the air outlet section 53 is horizontally arranged, and the distance between them is 5, an eccentric roller is arranged on the lower side of the air outlet, and the distance between the upper side of the eccentric roller and the upper side of the air outlet is 2-5.

[0117] Furthermore, the diameter of the eccentric roller is 3.

[0118] Furthermore, the mixing rollers 54 are arranged in three layers, and are respectively the first layer, the second layer and the third layer from bottom to top. The first layer is provided with two mixing rollers 54, the second layer is provided with three mixing rollers 54, the third layer is provided with two mixing rollers 54, and the adjacent two layers are staggered and crossed.

[0119] Furthermore, the diameter of the mixing roller 54 is 3, the spacing between the three mixing rollers 54 arranged in the second layer is 2, and the spacing between the two sides and the inner wall of the mixing section 52 is 2, the first layer and the third layer are each provided with two mixing rollers 54, and the vertical height difference between the centers of the mixing rollers 54 between two adjacent layers is 3.5. The distance here is only for illustration and does not represent the specific length. Generally speaking, when the mixing roller 54 is purchased, its diameter is known and can be converted according to its actual length.

[0120] In the present application, the uniform air duct can be designed in centimeters. Further, the eccentric roller is driven by an eccentric drive motor. Generally, it can be set by a servo motor.

[0121] By setting the uniform air duct 5 in sections, when the wind from the fan enters the uniform air duct 5, the uneven wind can be made uniform after passing through the mixing roller 54 in the mixing section 52. At the same time, the reduced diameter setting of the air outlet section 53 can effectively increase the wind pressure. The setting of the eccentric roller can further increase the wind pressure. When the airflow web forming process of different materials is carried out, the appropriate wind pressure can be selected according to the state of the fiber, which provides a reliable guarantee for the airflow web forming process. At the same time, the uniform air duct 5 designed in the present application is better when applied to the multi-component airflow web forming of horsetail hair.

[0122] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An air-laid machine for uniform web formation, characterized in that: include: A frame (1), a cotton box (2) is arranged on the frame (1), the cotton box (2) is connected to the inlet of an opening unit (3) arranged on the frame (1), and a net unit (4) is arranged at the outlet of the opening unit (3); The web forming unit (4) arranged on the frame (1) comprises: A circulating conveying curtain (41), the circulating conveying curtain (41) comprising a first inclined portion (411), a second conveying portion (412), and a third recovery portion (413) which are arranged in sequence and in a closed manner, wherein the first inclined portion (411) is arranged obliquely from bottom to top, and the second conveying portion (412) is located above the third recovery portion (413); A circulating conveying roller (42), wherein the circulating conveying roller (42) is rotatably arranged on the frame (1), and one circulating conveying roller (42) is respectively arranged at the corners between the first inclined portion (411) and the second conveying portion (412), the second conveying portion (412) and the third recovery portion (413), and the third recovery portion (413) and the first inclined portion (411); A blowing assembly (43), wherein the air outlet of the blowing assembly (43) faces the first inclined portion (411); An air exhaust component (44), wherein the air suction port of the air exhaust component (44) is located inside the circulating conveying curtain (41).

2. The air-laid machine for uniform web formation according to claim 1, characterized in that: The conveying direction of the circulating conveying curtain (41) is the first inclined portion (411), the second conveying portion (412), the third recovery portion (413), and the first inclined portion (411).

3. The air-laid machine for uniform web formation according to claim 1, characterized in that: At least one expansion conveying roller (45) is arranged in the third recovery portion (413) to expand the third recovery portion (413) outward.

4. The air-laid machine for uniform web formation according to claim 1, characterized in that: The blowing assembly (43) comprises: A fan (431) disposed on the frame (1); An air outlet channel (432) is connected to the fan (431) via an air inlet duct, and the air outlet channel (432) is evenly distributed along the width direction of the circulating conveying curtain (41).

5. The air-laid machine for uniform web formation according to claim 4, characterized in that: An air inlet duct is connected to at least two of the air outlet channels (432), and the air outlet channels (432) are arranged in a curved manner.

6. The air-laid machine for uniform web formation according to claim 1, characterized in that: The blowing assembly (43) comprises: a fan (431) arranged on a frame (1); a uniform air duct (5) is arranged at the air outlet end of the fan, and the uniform air duct (5) comprises: An air inlet section (51), the air inlet section (51) being connected to an air outlet end of the fan; A mixing section (52), the mixing section (52) being connected to the air inlet section (51), and a mixing roller (54) being fixedly arranged in the mixing section (52), the mixing roller (54) being arranged in at least two layers, and the mixing rollers (54) between two adjacent layers being arranged in a staggered manner; and An air outlet section (53), the air outlet section (53) being connected to the mixing section (52), the air outlet section (53) being arranged in an arc-shaped reduced diameter, an adjusting roller (55) being eccentrically arranged at the air outlet of the air outlet section (53), and the adjusting roller (55) shielding the air outlet.

7. The air-laid machine for uniform web formation according to claim 6, characterized in that: The air inlet section (51) includes an air return portion (511), and the air from the fan enters the air return portion (511) and then enters the mixing section (52).

8. The air-laid machine for uniform web formation according to claim 6, characterized in that: The mixing rollers (54) are arranged in three layers, and are respectively a first layer, a second layer and a third layer from bottom to top; the first layer is provided with two mixing rollers (54); the second layer is provided with three mixing rollers (54); the third layer is provided with two mixing rollers (54); and adjacent two layers are staggered and cross-arranged.

9. The air-laid machine for uniform web formation according to claim 8, characterized in that: The diameter of the mixing roller (54) is 3, the spacing between the three mixing rollers (54) arranged on the second layer is 2, and the spacing between the two sides and the inner wall of the mixing section (52) is 2, two mixing rollers (54) are arranged on the first layer and the third layer, and the vertical height difference between the centers of the mixing rollers (54) between two adjacent layers is 3.

5.

10. The air-laid machine for uniform web formation according to claim 1, characterized in that: The air extraction component (44) comprises: a suction machine (441) arranged on the frame (1); and an air suction channel (442) connected to the suction machine (441) via an air extraction duct.

11. The air-laid machine for uniform web formation according to claim 1, characterized in that: A dust cage (47) is also rotatably arranged on the upper side of the second conveying portion (412), and the dust cage (47) presses the product on the second conveying portion (412). A cover shell (48) is also arranged on the outer side of the dust cage (47), and a negative pressure channel (49) is arranged on the cover shell (48).

12. The air-laid machine for uniform web formation according to claim 11, characterized in that: A support roller (410) is also rotatably arranged on the lower side of the second conveying portion (412), and the support roller (410) is located below the dust cage (47).

13. The air-laid machine for uniform web formation according to claim 1, characterized in that: The opening unit (3) comprises: an opening box (31), an opening roller (32) rotatably arranged inside the opening box (31), an opening channel (33) formed between the opening roller (32) and the inner wall of the opening box (31), a cotton inlet of the opening channel (33) being connected to the cotton box (2), and a cotton outlet of the opening channel (33) facing the first inclined portion (411).

14. The air-laid machine for uniform web formation according to claim 13, characterized in that: At least one of a dehairing roller (36) and a working roller (37) is also arranged in the opening channel (33).

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