High-yield airflow web forming device for stably generating high-strength fiber web from multi-specification fibers

Abstract

The invention discloses a high-yield air laying device for stably generating a high-strength fiber web from multi-specification fibers, and relates to the technical field of air laying equipment in non-woven fabric machinery. According to the invention, fibers are firstly carded and fully stretched into completely stretched single fibers, and then high-speed air flow net forming is carried out in the width-adjustable net forming air duct with enough conveying space by virtue of the cooperation of the pressure air flow and the suction air flow; finally, the uniform and thick high-strength fiber web with the longitudinal and transverse strength ratio close to 1: 1 and the gram weight up to 500 g / m can be stably, reliably and efficiently generated, the web surface quality and uniformity are obviously improved, the airflow web forming yield is obviously improved, meanwhile, the technical problems of static electricity, high temperature and the like generated during fiber carding are effectively solved, the production uncertainty is greatly reduced, and the production efficiency is improved. The production reliability and stability are improved, the limitation of fibers suitable for spinning is broken through, the application range is widened, and the universality is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of air-laid web equipment in nonwoven fabric machinery, and more specifically to a high-yield air-laid web device for stably generating high-strength fiber webs with fibers of various specifications. The present invention is particularly suitable for forming a carding-type air-laid web machine in cooperation with various carding machine bodies, and can generate uniform, thick, high-strength fiber webs with a longitudinal and transverse strength ratio of nearly 1:1 and a gram weight of up to 500g / m². Background Art

[0002] At present, the carding air-laid machine used in the production of spunlace and needle-punched nonwovens in the domestic and foreign markets is mainly used to produce high-strength fiber webs with thick weight (35-500g / m²) and a longitudinal and transverse strength ratio close to 1:1. There are two original web-forming modes for this type of machine: the first web-forming mode is that the fiber is directly air-laid on the cylinder (such as the foreign model K12, see Figure 4 ); The second web forming mode is that the fibers are stretched into stretched single fibers by high-speed air flow rollers and fixed cover plates after being carded (see Figure 5 , the high-speed air flow roller and the fixed cover plate are both covered with needle clothing), and then the air is air-flown into a web on the high-speed air flow roller.

[0003] The first web forming mode is to form a web by airflow through a combination of feeding-combing unit and cylinder combing-blowing and suction. The advantages of this web forming mode are simple structure and low cost. However, due to insufficient combing in this web forming mode, the fibers have various forms when combing in the combing area, such as straight, vertical, and curly. Therefore, the fibers cannot be fully stretched single fibers when finally forming the web, resulting in the defects of low output and poor uniformity of the web surface in this web forming mode.

[0004] The fibers in the second web forming mode have been sufficiently combed and stretched, and are fully stretched single fibers when they are finally webbed. Therefore, the advantage of the second web forming mode is that it can effectively improve the output and the uniformity of the web surface. The disadvantage of the second web forming mode is that the distance between the fixed cover plate and the high-speed airflow roller is very small, and it is a long arc surface covering mode, which causes static electricity, high temperature and other problems when the fibers flow here, resulting in great production uncertainty; it is precisely because of this that the airflow web machine of the second web forming mode cannot be used for pure polyester or high-proportion polyester. The only suitable spinning fibers are pure viscose, viscose + low-proportion antistatic polyester, raw cotton, etc., and the limitations of the suitable spinning fibers are also large; at the same time, due to the above-mentioned production uncertainty and the limitations of the suitable spinning fibers, the airflow web machine has extremely high requirements for the temperature and humidity in the production workshop. During production, the temperature and humidity of the workshop must be strictly controlled and no deviations can occur, so its production reliability is insufficient. Summary of the invention

[0005] The purpose of the present invention is to provide a high-yield air-laid web device for stably generating high-strength fiber webs from fibers of multiple specifications in order to address the deficiencies in the above-mentioned prior art. The present invention can stably, reliably and efficiently generate uniform, thick, high-strength fiber webs with a longitudinal and transverse strength ratio close to 1:1 and a gram weight of up to 500g / m², significantly improve the quality and uniformity of the web surface, and significantly increase the output of the air-laid web. At the same time, it effectively solves technical problems such as static electricity and high temperature generated during fiber combing, greatly reduces production uncertainty, improves production reliability and stability, breaks the limitations of suitable spinning fibers, expands the scope of application, and enhances versatility.

[0006] The purpose of the present invention can be achieved by the following technical solutions: The high-yield airflow web-forming device for stably generating high-strength fiber webs with multiple specifications of fibers of the present invention comprises a high-speed airflow roller (on the one hand, the high-speed airflow roller rotating at a high speed cooperates with the combing roller running at an ultra-low speed to produce relative motion, which can simply comb the fibers that have been combed in the combing area and fully stretch them into fully stretched, parallel single fibers, laying a good foundation for improving the quality of the subsequent airflow web surface and increasing the output; on the other hand, the high-speed airflow roller generates a strong centrifugal force when rotating at a high speed, and most of the fibers can be smoothly thrown off from the high-speed airflow roller by means of the centrifugal force), and the high-speed rotating rollers are arranged in front of the high-speed airflow rollers in a gap and tangential manner. The transfer roller (the main function of the high-speed transfer roller is to transfer the combed fibers in the combing area to the high-speed airflow roller), the two combing rollers arranged above the high-speed airflow roller (when the combing roller rotates clockwise, it cooperates with the high-speed airflow roller to play the role of combing and stretching the fibers; when the combing roller rotates counterclockwise, the excess fibers on the combing roller will be taken away by the high-speed airflow roller and enter the next round of combing to prevent winding), the arc plate I surrounding the upper right of the high-speed airflow roller, the upper arc plate II, the upper left arc plate III, the lower left leak bottom I, and the lower leak bottom II (the above arc plates and the leak bottom form a seal with the high-speed airflow roller to ensure that the fibers are in the high-speed airflow roller. When the air flow roller and the high-speed transfer roller and the high-speed air flow roller are in operation, they can be firmly controlled on the outer circumference of the high-speed air flow roller without overflowing flying flowers, thereby improving the net production and the uniformity of the net surface), the cotton stripping knife fixed on the right end face of the leak bottom II (can strip off the fibers that have not been completely separated from the high-speed air flow roller to prevent them from entering the high-speed air flow roller for cyclic combing again), the pressing roller and the bow-shaped expansion plate that are arranged on the right side of the high-speed air flow roller in a gap manner and are hingedly connected from bottom to top (on the one hand, the pressing roller cooperates with the supporting roller to clamp the air-permeable net curtain up and down; on the other hand, the pressing roller provides an installation basis for the bow-shaped expansion plate; at the same time, the pressing roller is arranged on the right side of the high-speed air flow roller in a gap manner and is hingedly connected from bottom to top The web roller connecting rod adjustment mechanism can move left and right under the push-pull action, driving the arched expansion plate to move synchronously, thereby changing the width of the airflow web channel to meet the web forming requirements of fibers of different specifications and thicknesses). The left side of the arched expansion plate and the right side of the arc plate I, the high-speed airflow roller, and the cotton stripping knife form a cavity that is wide at the top and narrow in the middle as the airflow web channel (the airflow web channel in the present invention is designed to be wide at the top and narrow in the middle, so that the airflow and the fiber encounter resistance at the upper part of the airflow web channel and change direction, so that the fiber forms an isotropic three-dimensional state, which is a key factor in forming a high-strength fiber web with a longitudinal and transverse strength ratio close to 1:1;After passing the narrowest middle part of the airflow-forming network channel and reaching the wider part at the bottom, with the assistance of the negative pressure suction airflow, the airflow direction carrying the isotropic fibers no longer deviates, and the fibers can fall steadily on the breathable mesh curtain along the direction of the negative pressure airflow). The outlet end of the blowing system is connected to the upper inlet of the airflow-forming network channel (providing blowing airflow for the fibers to be peeled off from the high-speed airflow roller). After the upper suction air duct and the lower suction air duct are combined and connected, the inlet end is directly opposite to and connected to the lower outlet of the airflow-forming network channel, and the outlet The suction duct connected to the negative pressure suction system at one end (serving as a connecting channel between the airflow net-forming channel and the negative pressure suction system), the net-supporting roller arranged below the net-pressing roller (on the one hand, the net-supporting roller and the four corner turning rollers jointly support the breathable net curtain; on the other hand, the net-supporting roller cooperates with the net-pressing roller to clamp the breathable net curtain up and down), the breathable net curtain looped on the net-supporting roller and the four corner turning rollers (the breathable net curtain circulates along the net-supporting roller and the four corner turning rollers, and is used to transfer the high-strength fiber net generated by the high-yield airflow to the next station ); The left side of the arched expansion plate is processed into a structure with a top chamfer and a bottom arc to form a shape with two bends at both ends and a drum in the middle (so that the airflow net-forming channel formed by the left side of the arched expansion plate and the right side of the arc plate I, the high-speed airflow roller, and the cotton stripping knife is a clamping cavity that is wide at the top and bottom and narrow in the middle), and a channel width adjustment connecting rod is hinged at the middle and upper part of the arched expansion plate (the arched expansion plate can be turned around the screen pressing roller as the axis under the push and pull action of the channel width adjustment connecting rod, thereby adjusting the overall width and capacity of the airflow net-forming channel to meet different specifications The right side of the press roller is connected with a press roller connecting rod adjustment mechanism (the press roller can move left and right under the push and pull action of the press roller connecting rod adjustment mechanism to adapt to the displacement of the bow-shaped expansion plate), and the right side of the support roller is connected with a support roller connecting rod adjustment mechanism for pushing the support roller to move left and right to adjust the width of the web (the support roller can move left and right under the push and pull action of the support roller connecting rod adjustment mechanism to change the width of the upper suction air duct, and adjust the width of the web together with the position adjustment of the press roller). ;

[0007] The blowing system described in the present invention is composed of a blowing bellows, two blowing fans arranged symmetrically on the left and right, which respectively connect the blowing hose I and the blowing hose II in parallel through a three-way pipe and then connect the inlet end of the blowing bellows through their corresponding square-to-circle air inlet pipes I, and an air nozzle connected between the outlet end of the blowing bellows and the upper inlet of the airflow netting channel (the inlet end of the blowing bellows is connected to the two blowing fans through four air inlet branches, respectively, to provide sufficient blowing airflow for the fibers to be peeled off from the high-speed airflow roller), and in the inner cavity of the blowing bellows, there are arranged vertically staggered and spaced uniform air plates (for uniform airflow).

[0008] The negative pressure suction system described in the present invention is composed of two negative pressure suction fans arranged symmetrically on the left and right, which are respectively connected to the outlet end of the main suction duct in parallel through the square-to-circular pipe II, and the inlet end of the main suction duct is connected with the outlet end of the lower suction duct (in this way, the two negative pressure suction fans simultaneously suck and process the airflow from the airflow network channel from both sides and pass through the upper suction duct, the lower suction duct, and the main suction duct in turn. With the assistance of the negative pressure suction airflow, the direction of the airflow carrying the isotropic fibers no longer deviates when it reaches the wider part below the airflow network channel, and the fibers can fall smoothly on the breathable mesh curtain along the direction of the negative pressure airflow).

[0009] The rotation speed of the high-speed airflow roller in the present invention is greater than 4000 m / min (the greater the rotation speed of the high-speed airflow roller, the greater the centrifugal force generated, so that more fibers can be smoothly thrown off the high-speed airflow roller with the help of centrifugal force during high production).

[0010] The operating speed of the combing roller in the present invention is 0.3-0.4 m / min (the ultra-slow-speed combing roller and the high-speed airflow roller rotate at a high speed cooperate to produce relative movement, which can simply comb the fibers that have been combed in the combing area and fully stretch them into fully stretched, parallel single fibers). The combing roller can rotate in both directions and the rotation angle is adjustable (when the combing roller rotates clockwise, the high-speed airflow roller plays a role in combing the fibers. When the combing roller rotates counterclockwise, the high-speed airflow roller can take away the excess fibers on the hook of the combing roller and enter the next round of combing to prevent flower wrapping).

[0011] The top of the cotton stripping knife in the present invention is processed with an arc that matches the roller surface of the high-speed airflow roller, and the distance between the arc-shaped top of the cotton stripping knife and the roller surface of the high-speed airflow roller is 1 mm (it can strip off the fibers that have not been completely separated from the high-speed airflow roller and prevent them from entering the high-speed airflow roller for cyclic combing again).

[0012] The right side blocking plate of the upper air duct in the upper suction air duct described in the present invention can swing left and right as the position of the net supporting roller moves left and right under the push-pull action of the net supporting roller connecting rod adjusting mechanism, the right side blocking plate of the upper air duct swings left and right accordingly, while the left side blocking plate of the upper air duct is fixed, thereby changing the width of the upper suction air duct and further adjusting the width of the net).

[0013] The design principle of the present invention is as follows: The present invention can make the fibers firstly be combed and fully stretched into fully extended single fibers, and then be formed into high-speed airflow nets in a net-forming air duct with sufficient conveying space and adjustable width by means of the cooperation of compressed airflow and suction airflow, and finally stably, reliably and efficiently generate a uniform, thick, high-strength fiber net with a longitudinal and transverse strength ratio close to 1:1 and a gram weight of up to 500g / m². More specifically, the high-speed rotating high-speed airflow roller and the ultra-low-speed combing roller above the present invention cooperate with each other to simply comb the fibers that have been combed in the combing area and fully stretch them into fully extended, parallel single fibers; at the same time, the arc plate and the leaky bottom covering the circumference of the high-speed airflow roller can keep the fibers in a sealed state when running on the high-speed airflow roller, and will not overflow to form flying flowers; the above two features can ensure that the airflow netting effect is very good, the net surface quality is significantly improved, and the output of airflow netting is also significantly improved. In the present invention, a combing roller running at an ultra-low speed replaces the traditional fixed cover plate, and cooperates with the high-speed air flow roller to form a combing and stretching function, thereby reducing the area of ​​the needle clothing docking as much as possible, and effectively solving the problems of static electricity, high temperature, etc. generated when the fibers are combed at this position without affecting the function, reducing the uncertainty of the production process, breaking the limitations of suitable spinning fibers, and improving the reliability and stability of production; at the same time, the combing method of the combing roller combines the advantages of cover plate combing and roller combing, that is, it combines the advantages of the roller for easy processing and the cover plate for easy combing, which not only solves the processing problems, but also realizes sufficient combing. The airflow netting channel in the present invention is designed to be wide at the top and bottom and narrow in the middle, so that the airflow and fibers encounter resistance in the upper part of the airflow netting channel and change direction, so that the fibers form an isotropic three-dimensional state, which is a key factor in forming a high-strength fiber net with a longitudinal and transverse strength ratio close to 1:1; and after passing the narrowest middle part of the airflow netting channel and reaching the wider part below, with the assistance of the negative pressure suction airflow, the airflow direction carrying the isotropic fibers no longer deflects, and the fibers can fall steadily on the breathable net curtain along the direction of the negative pressure airflow. At the same time, the present invention is provided with two high-power suction fans on both sides of the width of the suction duct, which can timely deal with the airflow used to strip the fibers in the airflow netting channel and the centrifugal airflow generated when the airflow roller rotates at high speed, and guide the fibers to fall on the net curtain along the direction of the negative pressure airflow. Therefore, the coordination of the compressed airflow of the blowing system and the suction airflow of the negative pressure suction system and the direction guidance of the negative pressure airflow are all key factors for high yield and high quality of airflow netting. In addition, the bow-shaped expansion plate, screen pressing roller, screen supporting roller and upper suction duct in the present invention can be flexibly adjusted, that is, the width and capacity of the airflow screen channel can be flexibly adjusted as needed to meet the production needs of different fiber varieties, different gram weights and different outputs, thereby expanding the scope of application of the present invention and enhancing the versatility and operational flexibility of the present invention.

[0014] The beneficial technical effects of the present invention are as follows: The present invention can stably, reliably and efficiently generate a uniform, thick, high-strength fiber web with a longitudinal and transverse strength ratio of nearly 1:1 and a gram weight of up to 500g / m², the quality and uniformity of the web surface are significantly improved, the output of the air-laid web is significantly improved, and at the same time, technical problems such as static electricity and high temperature generated during fiber combing are effectively solved, which greatly reduces production uncertainty, improves production reliability and stability, breaks the limitations of suitable spinning fibers, expands the scope of application, and enhances versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 yes Figure 1 A-direction diagram.

[0017] Figure 3 yes Figure 1 B direction diagram.

[0018] Figure 4 It is a schematic diagram of the structure of the traditional representative structure 1 (i.e., the air-laid structure K12 in which the fibers are directly air-laid on the cylinder).

[0019] Figure 5 It is a schematic diagram of the structure of the traditional representative structure 2 (i.e., the fiber, after being combed, is first stretched into a stretched single fiber by a high-speed airflow roller and a fixed cover plate and then air-laid on the high-speed airflow roller).

[0020] Figure 1 to Figure 3 Parts number description: 1. High-speed transfer roller, 2. Curved plate III, 3. High-speed airflow roller, 4. Curved plate II, 5. Combing roller, 6. Curved plate I, 7. Leakage bottom I, 8. Bow-shaped expansion plate, 9. Airflow net channel, 10. Channel width adjustment connecting rod, 11. Pressing net roller, 12. Net supporting roller, 13. Upper air duct right blocking plate, 14. Lower suction air duct, 15. Upper suction air duct, 16. Corner turning roller, 17. Cotton stripping knife, 18. Leakage bottom II, 19. Breathable net curtain, 20. Main suction Air duct, 21. Square-to-circular duct II, 22. Negative pressure suction fan, 23. Blowing fan, 24. Wind uniformity plate, 25. Blowing bellows, 26. Blowing nozzle, 27. Three-way duct, 28. Blowing hose I, 29. Blowing hose II, 30. Square-to-circular air inlet duct I, 31. Screen pressing roller connecting rod adjustment mechanism, 32. Screen supporting roller connecting rod adjustment mechanism, 33. Left side blocking plate of upper air duct, C, Blowing system, D, Negative pressure suction system, E, Suction duct, W, Web width, FK, Width.

[0021] Figure 4Description of the part numbers: 36. Feed roller Ⅰ, 37. Feed roller Ⅱ, 38. Feed curtain, 39. Cotton pressing roller, 40. Working roller, 41. Stripping roller, 42. Traditional airflow netting channel Ⅰ, 43. Adjustment plate for adjusting the width of the airflow netting channel, 44. Fan impeller with full width direction, 45. Cylinder, 46. Traditional net pressing roller Ⅰ, 47. Traditional negative pressure suction system Ⅰ, 48. Traditional breathable net curtain Ⅰ.

[0022] Figure 5 Description of the part numbers: 51. Traditional high-speed transfer roller, 52. Traditional arc plate, 53. Traditional high-speed air flow roller, 54. Traditional fixed cover plate, 55. Traditional air blowing nozzle, 56. Traditional air blowing fan, 57. Traditional bow-shaped expansion plate, 58. Traditional air flow net channel II, 59. Traditional breathable net curtain II, 60. Traditional net pressing roller II, 61. Traditional net supporting roller, 62. Traditional negative pressure suction system II, 63. Bottom leakage under the traditional high-speed air flow roller. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1 to Figure 5As shown, the high-yield airflow web-forming device for stably generating high-strength fiber webs with multi-specification fibers of the present invention is characterized in that: the web-forming device comprises a high-speed airflow roller 3 (on the one hand, the high-speed airflow roller 3 rotating at a high speed cooperates with the combing roller 5 running at an ultra-low speed to produce relative movement, which can simply comb the fibers that have been combed in the combing area and fully stretch them into fully stretched, parallel single fibers, laying a good foundation for improving the quality of the subsequent airflow web surface and increasing the output; on the other hand, the high-speed airflow roller 3 will generate a strong centrifugal force when rotating at a high speed, and most of the fibers can be smoothly thrown off from the high-speed airflow roller 3 by means of the centrifugal force), and the high-speed airflow roller 3 is arranged in front of the high-speed airflow roller 3 in a gap and tangential manner. The high-speed transfer roller 1 (the main function of the high-speed transfer roller 1 is to transfer the combed fibers in the combing area to the high-speed air flow roller 3), the two combing rollers 5 arranged above the high-speed air flow roller 3 (when the combing roller 5 rotates clockwise, it cooperates with the high-speed air flow roller 3 to play the role of combing and stretching the fibers; when the combing roller 5 rotates counterclockwise, the excess fibers on the combing roller 5 will be taken away by the high-speed air flow roller 3 and enter the next round of combing to prevent winding), the arc plate I6 surrounding the upper right of the high-speed air flow roller 3, the upper arc plate II4, the upper left arc plate III2, the lower left leak bottom I7, and the lower leak bottom II18 (the above arc plates and the leak bottom form a seal with the high-speed air flow roller 3 to ensure that the fibers are When the high-speed airflow roller 3 and the high-speed transfer roller 1 and the high-speed airflow roller 3 and the combing roller 5 are in operation, they can be firmly controlled on the outer circumference of the high-speed airflow roller 3 without overflowing flying flowers, thereby improving the net production and the uniformity of the net surface), the stripping knife 17 fixed on the right end face of the leaking bottom II 18 (can strip the fibers that have not been completely separated from the high-speed airflow roller 3 to prevent them from entering the high-speed airflow roller 3 for cyclic combing again), the pressing roller 11 and the arched expansion plate 8 arranged in a gap manner on the right side of the high-speed airflow roller 3 and hingedly connected from bottom to top (on the one hand, the pressing roller 11 cooperates with the supporting roller 12 to clamp the air-permeable net curtain 19 up and down; on the other hand, the pressing roller 11 provides a mounting base for the arched expansion plate 8; At the same time, the pressing roller 11 can move left and right under the push-pull action of the pressing roller connecting rod adjustment mechanism 31, driving the arched expansion plate 8 to move synchronously, thereby changing the width of the airflow web channel 9 to meet the web forming requirements of fibers of different specifications and thicknesses). The left side of the arched expansion plate 8 and the right side of the arc plate Ⅰ6, the high-speed airflow roller 3, and the cotton stripping knife 17 form a cavity that is wide at the top and bottom and narrow in the middle as the airflow web channel 9 (the airflow web channel in the present invention is designed to be wide at the top and bottom and narrow in the middle, so that the airflow and fibers encounter resistance at the upper part of the airflow web channel 9 and change direction, so that the fibers form an isotropic three-dimensional state, which is a key factor in forming a high-strength fiber web with a longitudinal and transverse strength ratio close to 1:1;After passing the narrowest middle part of the airflow-forming net channel 9 and reaching the wider part below, with the assistance of the negative pressure suction airflow, the airflow direction carrying the isotropic fibers no longer deviates, and the fibers can fall steadily on the breathable mesh curtain 19 along the direction of the negative pressure airflow). The outlet end of the blowing system C is connected to the upper inlet of the airflow-forming net channel 9 (providing a blowing airflow for the fibers to be peeled off from the high-speed airflow roller 3). The upper suction duct 15 and the lower suction duct 14 are connected in combination, the inlet end of which is directly opposite to and connected to the lower outlet of the airflow-forming net channel 9, and the outlet end is connected to the negative pressure suction system D. The connected suction duct E (serves as a connecting channel between the airflow web-forming channel 9 and the negative pressure suction system D), the web-supporting roller 12 arranged below the web-pressing roller (on the one hand, the web-supporting roller 12 and the four corner turning rollers 16 jointly support the air-permeable web curtain 19; on the other hand, the web-supporting roller 12 cooperates with the web-pressing roller 11 to clamp the air-permeable web curtain 19 up and down), the air-permeable web curtain 19 looped around the web-supporting roller 12 and the four corner turning rollers 16 (the air-permeable web curtain 19 circulates along the web-supporting roller 12 and the four corner turning rollers 16, and is used to transport the high-strength fiber web generated by the high-yield airflow to the next process The left side of the arched expansion plate 8 is processed into a structure with a top chamfer and a bottom arc to form a shape with two bends at both ends and a drum in the middle (so that the airflow netting channel 9 formed by the left side of the arched expansion plate 8 and the right side of the arc plate Ⅰ6, the high-speed airflow roller 3, and the cotton stripping knife 17 is a clamping cavity that is wide at the top and bottom and narrow in the middle), and a channel width adjustment connecting rod 10 is hinged on the middle and upper part of the arched expansion plate 8 (the arched expansion plate 8 can be turned over with the pressing roller 11 as the axis under the push and pull action of the channel width adjustment connecting rod 10, thereby adjusting the overall width and capacity of the airflow netting channel 9 to meet the needs of fibers of different specifications The right side of the screen roller 11 is connected with a screen roller connecting rod adjustment mechanism 31 (the screen roller 11 can move left and right under the push and pull action of the screen roller connecting rod adjustment mechanism 31 to adapt to the displacement of the bow-shaped expansion plate 8), and the right side of the screen roller 12 is connected with a screen roller connecting rod adjustment mechanism 32 for pushing the screen roller to move left and right to adjust the screen width W (the screen roller 12 can move left and right under the push and pull action of the screen roller connecting rod adjustment mechanism 32 to change the width of the upper suction air duct 15, and cooperate with the position adjustment of the screen roller 11 to adjust the screen width W). ;

[0024] The blowing system C described in the present invention is composed of a blowing bellows 25, two blowing fans 23 symmetrically arranged on the left and right, which respectively connect the blowing hose Ⅰ28 and the blowing hose Ⅱ29 in parallel through the three-way pipe 27 and then simultaneously connect the inlet end of the blowing bellows 25 through their respective corresponding square-to-circular air inlet pipes Ⅰ30, and the blowing nozzle 26 connected between the outlet end of the blowing bellows 25 and the upper inlet of the airflow netting channel 9 (the inlet end of the blowing bellows 25 is connected to the two blowing fans 23 through four air inlet branches, respectively, to provide sufficient blowing airflow for the fibers to be peeled off from the high-speed airflow roller 3), and in the inner cavity of the blowing bellows 25, there are arranged vertically staggered and spaced uniform air plates 24 (for uniform airflow).

[0025] The negative pressure suction system D described in the present invention is composed of two negative pressure suction fans 22 arranged symmetrically on the left and right, which are respectively connected to the outlet end of the main suction duct 20 in parallel through the square-to-circular pipe II 21, and the inlet end of the main suction duct 20 is connected with the outlet end of the lower suction duct 14 (in this way, the two negative pressure suction fans 22 simultaneously suck and process the airflow from the airflow forming channel 9 from both sides and pass through the upper suction duct 15, the lower suction duct 14, and the main suction duct 20 in turn. With the assistance of the negative pressure suction airflow, the direction of the airflow carrying the isotropic fibers no longer deviates when it reaches the wider part below the airflow forming channel 9, and the fibers can fall smoothly on the breathable mesh curtain 19 along the direction of the negative pressure airflow).

[0026] The rotation speed of the high-speed airflow roller 3 in the present invention is greater than 4000 m / min (the greater the rotation speed of the high-speed airflow roller 3, the greater the centrifugal force generated, so that more fibers can be smoothly thrown off the high-speed airflow roller 3 with the help of centrifugal force during high production).

[0027] The operating speed of the combing roller 5 described in the present invention is 0.3-0.4 m / min (the ultra-slow-speed combing roller 5 and the high-speed airflow roller 3 rotating at high speed cooperate to produce relative movement, which can simply comb the fibers that have been combed in the combing area and fully stretch them into fully stretched, parallel single fibers). The combing roller 5 can rotate in both directions and the rotation angle is adjustable (when the combing roller 5 rotates clockwise, the high-speed airflow roller 3 plays a role in combing the fibers. When the combing roller 5 rotates counterclockwise, the high-speed airflow roller 3 can take away the excess fibers hooked on the combing roller 5 and enter the next round of combing to prevent flower wrapping).

[0028] The top end of the cotton stripping knife 17 in the present invention is processed with an arc that matches the roller surface of the high-speed airflow roller 3, and the distance between the arc-shaped top end of the cotton stripping knife 17 and the roller surface of the high-speed airflow roller 3 is 1 mm (it can strip off the fibers that have not been cleanly separated from the high-speed airflow roller 3 and prevent them from entering the high-speed airflow roller 3 for circulation and combing again).

[0029] The right side blocking plate 13 of the upper air duct in the upper suction air duct 15 described in the present invention can swing left and right as the position of the net supporting roller 12 moves left and right (when the net supporting roller 12 moves left and right under the push-pull action of the net supporting roller connecting rod adjusting mechanism 32, the right side blocking plate 13 of the upper air duct swings left and right accordingly, while the left side blocking plate 33 of the upper air duct is fixed, thereby changing the width of the upper suction air duct 15 and further adjusting the net width W).

[0030] The specific use of the present invention is as follows: First, the fibers that have been combed in the previous combing station (the combing method can be various combing modes such as large roller combing, multi-roller combing, single cylinder combing, double cylinder combing, etc.) are stripped off by the high-speed transfer roller 1, and then the high-speed air flow roller 3 with a speed of more than 4000m / min peels these fibers off from the high-speed transfer roller 1. At this time, the combed fibers are in various forms such as straight, vertical, and curly.

[0031] Next, the fibers enter the area where the high-speed rotating high-speed airflow roller 3 cooperates with the two ultra-low-speed combing rollers 5 above (the speed of the combing rollers 5 is set at 0.3-0.4 m / min), and the combing rollers 5 can rotate alternately in the positive and reverse directions according to a certain frequency - when the combing rollers 5 rotate clockwise, that is, the combing rollers 5 and the high-speed airflow rollers 3 move towards each other, the high-speed rotating high-speed airflow rollers 3 and the ultra-low-speed combing rollers 5 cooperate to produce relative motion, which can simply comb the fibers that have been combed in the combing area again and fully comb them. The fibers are stretched into fully stretched and parallel single fibers, which lays a good foundation for the improvement of the quality of the subsequent air-laid web surface and the increase of production; when the combing roller 5 rotates counterclockwise, that is, the combing roller 5 and the high-speed air roller 3 are opposite to each other, the excess fibers occasionally wrapped around the combing roller 5 are stripped off and taken away by the high-speed air roller 3 to enter the next round of combing to prevent the fibers from being wrapped around. The arc plates III2, II4 and I6 surrounding the high-speed air roller 3 and the combing roller 5 can also help the high-speed air roller 3 to strip the fibers from the combing roller 5. At the same time, since the high-speed air roller 3 is provided with the leaking bottom I7, the leaking bottom II18, the arc plates III2, II4 and I6 on the circumference, and the two combing rollers 5, a sealing area is formed before reaching the air-laid web channel 9, even if the high-speed air roller 3 rotates at a high speed, the fibers can be firmly wrapped around the outer circumference of the roller body and will not overflow to form flying flowers. The above two features can ensure that the air-laid web has a good effect, the web surface quality is significantly improved, and the output of the air-laid web is also significantly improved. In addition, the ultra-low-speed combing roller in the present invention replaces the traditional fixed cover plate, and cooperates with the high-speed air roller to form the combing and stretching functions, which reduces the docking area of ​​the needle clothing as much as possible, and effectively solves the problems of static electricity and high temperature generated when the fiber is combed at this position without affecting the function, reduces the uncertainty of the production process, breaks the limitations of the suitable spinning fibers, and improves the reliability and stability of production.

[0032] Then, since the high-speed air flow roller 3 generates a large centrifugal force through high-speed rotation, the fibers at the end of the arc plate Ⅰ6 are thrown into the wider upper cavity of the air flow netting channel 9; at the same time, the blowing nozzle 26 connected to the upper cavity of the air flow netting channel 9 sprays out the blowing air flow provided by the blowing system C - that is, the blowing air flow enters from two parallel blowing fans 23, and passes through four air inlet branches in turn and merges into the blowing bellows 25 and then is sprayed out through the blowing nozzle 26, thereby ensuring that the fibers are in a stretched state for detachment and transportation.

[0033] Next, the fibers separated from the high-speed air flow roller 3 are transported downward along the airflow-forming channel 9 under the action of the blowing air flow; since the airflow-forming channel 9 is wide at the top and bottom and narrow in the middle, the airflow and the fibers encounter resistance at the upper part of the airflow-forming channel 9 and change direction, so that the fibers form an isotropic three-dimensional state, which is a key factor in forming a high-strength fiber web with a longitudinal and transverse strength ratio close to 1:1. In this way, a uniform, thick, longitudinal and transverse strength ratio of close to 1:1 and a gram weight of up to 500g / m² can be generated, the quality and uniformity of the web surface are significantly improved, and the output of the airflow-forming network is significantly improved; and after passing through the airflow-forming channel 9 is at its narrowest middle part and reaches the wider part at the bottom, with the assistance of the negative pressure suction airflow provided by the negative pressure suction system D - that is, two negative pressure suction fans 22 simultaneously suck the air from both sides from the airflow forming channel 9 and successively pass through the upper suction duct 15, the lower suction duct 14 and the main suction duct 20, the airflow direction carrying the isotropic fibers is no longer deflected, and the fibers can fall steadily on the breathable mesh curtain 19 along the direction of the negative pressure airflow; therefore, the coordination of the compressed airflow of the blowing system C and the suction airflow of the negative pressure suction system D and the direction guidance of the negative pressure airflow are the key factors for high yield and high quality of airflow forming.

[0034] Finally, the air-permeable mesh curtain 19 circulates along the mesh supporting roller 12 and the four corner turning rollers 16 to transfer the high-strength fiber web generated by the high-yield airflow to the next station.

[0035] At the same time, since the fiber web gram weight span that the air-laid device of the present invention needs to produce is relatively large (35-500g / m²), the width and capacity of the corresponding air-laid channel 9 need to be adjusted according to the fiber web gram weight, so the bow-shaped expansion plate 8 is set to an adjustable mode - that is, the bow-shaped expansion plate 8 can be turned around the pressing roller 11 as the axis under the push-pull action of the channel width adjustment connecting rod 10, and then the overall width and capacity of the air-laid channel 9 can be adjusted to meet the web forming requirements of fibers of different specifications and thicknesses; the pressing roller 11 can move left and right under the push-pull action of the pressing roller connecting rod adjustment mechanism 31 to adapt to the displacement of the bow-shaped expansion plate 8; at the same time, when When the net-supporting roller 12 moves left and right under the push-pull action of the net-supporting roller connecting rod adjusting mechanism 32, the right side blocking plate 13 of the upper air duct of the upper suction air duct 15 can swing left and right as the position of the net-supporting roller 12 moves, while the left side blocking plate 33 of the upper air duct is fixed, thereby changing the width of the upper suction air duct 15 and further adjusting the net width W; and the net-supporting roller 12, the lower suction air duct 14 and the upper suction air duct 15 are arranged below the breathable net curtain 19. The net-supporting roller 12 can move left and right under the push-pull action of the net-supporting roller connecting rod adjusting mechanism 32 to change the width of the upper suction air duct 15, and cooperate with the position adjustment of the pressing roller 11 to jointly adjust the net width W. To sum up, through the adjustable mode design of the above-mentioned components, the present invention can be utilized because the bow-shaped expansion plate 8, the screen pressing roller 11, the screen supporting roller 12, and the upper suction duct 15 in the present invention can all be flexibly adjusted, that is, the width and capacity of the airflow screen channel 9 can be flexibly adjusted as needed, which can meet the production needs of different fiber varieties, different gram weights and different outputs, thereby expanding the scope of application of the present invention and enhancing the versatility and operational flexibility of the present invention.

Claims

1. A high-yield air-laid device for stably generating high-strength fiber webs from fibers of various specifications, characterized in that: The web forming device comprises a high-speed airflow roller (3), a high-speed transfer roller (1) arranged in front of the high-speed airflow roller (3) in a gap and tangential manner, two combing rollers (5) arranged above the high-speed airflow roller (3), an arc plate I (6) respectively surrounding the upper right of the high-speed airflow roller (3), an arc plate II (4) above, an arc plate III (2) on the upper left, a leaking bottom I (7) on the lower left, and a leaking bottom II (18) below, a cotton stripping knife (17) fixed on the right end surface of the leaking bottom II (18), a web pressing roller (11) and an arched expansion plate (8) arranged in a gap manner on the right side of the high-speed airflow roller (3) and hingedly connected from bottom to top, a cavity wide at the top and bottom and narrow in the middle formed by the left side of the arched expansion plate (8) and the right side of the arc plate I (6), the high-speed airflow roller (3) and the cotton stripping knife (17) as an airflow web forming channel (9), and the outlet end is connected to the air flow roller (11) and the arced expansion plate (8) A blowing system (C) at the inlet of the web-forming channel, a suction duct (E) whose inlet end faces and communicates with the lower outlet of the web-forming channel (9) after being combined and connected with an upper suction duct (15) and a lower suction duct (14), and whose outlet end is connected with a negative pressure suction system (D), a web-supporting roller (12) arranged below the web-pressing roller, and a breathable net curtain (19) sleeved on the web-supporting roller (12) and four corner turning rollers (16); the left side of the arch-shaped expansion plate (8) is processed into a structure with a top chamfer and a bottom arc to form a shape with two ends bent and a middle bulge; a channel width adjustment connecting rod (10) is hinged at the middle and upper part of the arch-shaped expansion plate (8); a web-pressing roller connecting rod adjustment mechanism (31) is connected to the right side of the web-pressing roller (11); and a web-supporting roller connecting rod adjustment mechanism (32) for pushing the web-supporting roller to move left and right to adjust the web width (W) is connected to the right side of the web-supporting roller (12).

2. The high-yield air-laid device for stably generating high-strength fiber webs from fibers of multiple specifications according to claim 1, characterized in that: The blowing system (C) is composed of a blowing bellows (25), two blowing fans (23) arranged symmetrically on the left and right, which are connected in parallel to the blowing hose I (28) and the blowing hose II (29) through the three-way pipe (27) and then connected to the inlet end of the blowing bellows (25) through the corresponding square-to-circular air inlet pipe I (30), and the blowing nozzle (26) connected between the outlet end of the blowing bellows (25) and the upper inlet of the air flow net channel (9). In the inner cavity of the blowing bellows (25), there are arranged wind uniforming plates (24) which are staggered up and down and distributed at intervals.

3. The high-yield air-laid device for stably generating high-strength fiber webs from fibers of multiple specifications according to claim 1, characterized in that: The negative pressure suction system (D) comprises two negative pressure suction fans (22) arranged symmetrically on the left and right and connected in parallel to the outlet end of the main suction air duct (20) through a square-to-circular pipe II (21), and the inlet end of the main suction air duct (20) is connected to the outlet end of the lower suction air duct (14).

4. The high-yield air-laid device for stably generating high-strength fiber webs from fibers of multiple specifications according to claim 1, characterized in that: The rotation speed of the high-speed air flow roller (3) is greater than 4000 m / min.

5. The high-yield air-laid device for stably generating high-strength fiber webs from fibers of multiple specifications according to claim 1, characterized in that: The operating speed of the combing roller (5) is 0.3-0.4 m / min, and the combing roller (5) can rotate in both directions, and the rotation angle is adjustable.

6. The high-yield air-laid device for stably generating high-strength fiber webs from fibers of multiple specifications according to claim 1, characterized in that: The top end of the cotton stripping knife (17) is processed into an arc shape that matches the roller surface of the high-speed airflow roller (3), and the distance between the arc-shaped top end of the cotton stripping knife (17) and the roller surface of the high-speed airflow roller (3) is 1 mm.

7. The high-yield air-laid device for stably generating high-strength fiber webs from fibers of multiple specifications according to claim 1, characterized in that: The upper air duct right side blocking plate (13) in the upper suction air duct (15) can swing left and right as the position of the net supporting roller (12) moves.

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