Fiber web transfer unit for a fiber web lamination outfeed structure

Abstract

The application discloses a fiber web transfer unit of a fiber web laminated out-of-net structure, comprising a transfer roller, a breathable transfer belt and a negative pressure auxiliary mechanism. On the one hand, the unit cooperates with pre-stripping and positive stripping to make the stripping force uniform and comprehensive, reduce fiber damage, facilitate the fiber web to separate from the coagulation roller, eliminate uneven stress, and avoid stripping and transfer interference, thereby improving the fiber transfer effect and the fiber web quality. On the other hand, the arrangement of the strip-shaped adsorption holes forms a cooperation between stripping and transfer ports to prevent the fiber web from warping and deforming. The multiple groups of strip-shaped adsorption holes are spaced and staggered to relieve adsorption pulling, overcome uneven or insufficient stress of the out-of-net, and the extension directions of the strip-shaped adsorption holes intersect to enhance the adhesion force and reduce the deformation rate.

Description

[0001] This application is a divisional application of the application filed on February 5, 2026, with application number 2026101631102, entitled "Laminated Fiber Mesh Structure". Technical Field

[0002] This invention belongs to the field of carding machine technology, and specifically relates to a fiber web transfer unit with a fiber web stacked exit structure. Background Technology

[0003] A carding machine is a textile machinery used to process fibers. Its working principle is to open and remove impurities from pre-processed fiber raw materials, and to card block fibers into bundles and single fibers to form a thin layer of mesh fibers.

[0004] Currently, with the increasing demand for product thickness, carding machines perform multi-doffer layered carding, and the fiber webs after each layer of carding need to be stacked layer by layer and output horizontally by a conveyor belt. However, the following technical challenges often arise during the stacking process: 1) Because a fiber web transfer section is formed between each adjacent upper and lower condensing roller, once the fiber web transfer section floats, not only will the resulting airflow affect the transfer of the fiber web by the lower condensing roller, but it will also change the tightness of the fiber web transfer section. That is, not only will the carding force of the lower fiber web change significantly, but the fiber transfer will also be insufficient. As a result, the fiber will adhere to the doffer card cloth and be difficult to peel off, forming stagnation points, which will then develop into neps (core hazard: destroying the uniform distribution of fibers and forming dense hard lumps; end result: filter blockage / weak mechanical areas / bacterial breeding ground) and white spots (core hazard: local fiber loss, interruption of structural continuity; end result: leakage / holes / protection failure). At the same time, during the multi-layer laying process, local wrinkles will appear in the fiber web layer, resulting in uneven thickness of the final web layer, and the density and strength of the fiber web will be difficult to meet the processing requirements. That is, the fiber web quality has serious defects. 2) Partial negative pressure adsorption is used for the fiber web exit, such as in common moving negative pressure rollers. This involves adsorption through multiple points of adsorption holes on the roller to keep the fiber web moving synchronously with it. These adsorption points are typically circular, arranged in a ring array on the outer wall of the roller. However, when the width of the fiber layer is large (e.g., 3.6m, 4.2m, 4.6m, etc.), the negative pressure points are relatively separated, weakening the adsorption force between adjacent holes. This not only increases the warping or deformation rate of the fiber web but also causes tension on the fiber web during exit, resulting in a high fiber damage rate and uneven fiber stress, severely affecting the quality of the exited web. Furthermore, the movement of the fiber web between the negative pressure points can cause interfering airflow to enter between the roller and the fiber. If this airflow is not dispersed and guided, the resulting turbulent airflow can cause the fiber web to bulge or shift relative to the negative pressure roller, resulting not only in tension but also in uneven thickness of the laminated web, severely impacting the quality of the laminated web. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an improved fiber web transfer unit with a fiber web stacked output structure.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A fiber web transfer unit with a layered fiber web structure is used to stack and transfer the fiber webs transferred by each condensing roller to a conveyor curtain. The fiber web transfer unit includes multiple transfer rollers with parallel core axes, a breathable transfer belt ring-shaped and mounted on some or all of the transfer rollers, and a negative pressure auxiliary mechanism. The negative pressure auxiliary mechanism includes a frame, a negative pressure chamber mounted on the frame, and a negative pressure power unit. The negative pressure chamber has multiple negative pressure adsorption chambers arranged sequentially from top to bottom. The adsorption end faces of the multiple negative pressure adsorption chambers are aligned and spliced ​​to form a sliding support adsorption adsorption transfer support surface on the back of the breathable transfer belt. Each negative pressure adsorption chamber has one or more sets of strip-shaped adsorption holes arranged at intervals and extending in the same direction on its adsorption end face. The strip-shaped adsorption holes on the adsorption end faces of the multiple negative pressure adsorption chambers are divided into stripping groups and transfer groups. Each coagulation roller is equipped with a stripping group and a transfer group. The stripping group is formed by the vertical spacing and staggered complementary arrangement of multiple sets of strip adsorption holes. The multiple sets of strip adsorption holes at each stripping port are divided into a main adsorption stripping part and an auxiliary adsorption stripping part. The main adsorption stripping part is aligned with the end of the coagulation roller to form a positive stripping perpendicular to the tangential output direction. The auxiliary adsorption stripping part is located above the main adsorption stripping part to form a pre-stripping. The pre-stripping changes the output direction of the fiber web to reduce the angle and instantaneous adsorption force of the positive stripping. The extension direction of the strip adsorption holes in the transfer group is the same as the movement direction of the fiber web. Each negative pressure adsorption chamber adsorption end face between every two adjacent stripping ports forms a transfer port, and the extension direction of the strip adsorption holes of the transfer port and the stripping port intersects.

[0007] Preferably, both the main adsorption and stripping section and the auxiliary adsorption and stripping section have a set of strip-shaped adsorption holes. Each set of strip-shaped adsorption holes has an equal length of 5-25 mm, and the distance between adjacent strip-shaped adsorption holes is less than the length of each hole. Generally, the length of the strip-shaped adsorption holes is approximately 10-20 mm. The smaller distance between the holes primarily controls the relatively uniform adsorption force between adjacent holes, reducing warping or deformation and enabling the formation of the desired quality fiber web.

[0008] In some specific embodiments, in the orthographic projection of each stripping port, the strip-shaped adsorption holes of the auxiliary adsorption stripping section are upper adsorption holes, and the strip-shaped adsorption holes of the main adsorption stripping section are lower adsorption holes. An upper adsorption hole is positioned between every two adjacent lower adsorption holes. The centers of one upper adsorption hole and the two lower adsorption holes form an isosceles triangle, with the apex angle of the isosceles triangle being an obtuse angle. This complementary arrangement of the upper and lower adsorption holes improves adsorption uniformity. Furthermore, the obtuse angle (typically 150°~170°) allows for control of the spacing between the upper and lower adsorption holes, thereby achieving the desired screen quality.

[0009] According to a specific embodiment and preferred aspect of the present invention, the strip-shaped adsorption holes of the transfer port are aligned vertically. The transfer port used is mainly to form a balanced adsorption and keep the fiber web and the exit transfer section moving synchronously. At the same time, the orientation setting reduces the displacement rate of the fiber web and the relative exit transfer section (mainly to reduce the displacement of the fiber web relative to the exit transfer section caused by the airflow during movement).

[0010] According to another specific embodiment and preferred aspect of the present invention, the alignment layout between two adjacent transfer ports, based on the top-bottom and left-right alignment layout, not only eliminates the relative pulling and displacement of the fiber web that may be caused between two adjacent transfer ports, but also makes the transfer smoother and relatively reduces the warping or deformation rate of the fiber web.

[0011] Furthermore, at least N negative pressure adsorption chambers are formed between every two stripping ports, where N is an even number ≥ 2, and the negative pressure adsorption chambers at each stripping port are connected to the negative pressure adsorption chambers at the transfer port. This not only ensures that the number of negative pressure chambers meets the requirements for stripping and transfer, but also that the resulting negative pressure is relatively balanced, while also facilitating implementation and reducing manufacturing and usage costs.

[0012] According to a specific embodiment and preferred aspect of the present invention, the negative pressure auxiliary mechanism includes a frame, a negative pressure chamber mounted on the frame, and a negative pressure power unit. The negative pressure chamber is divided into an upper chamber and a lower chamber based on the layout of two adjacent condensing rollers. The upper chamber includes a peeling chamber and a transfer chamber that are connected and arranged vertically. The transfer port is located on the adsorption end face of the transfer chamber, and the peeling port is located on the adsorption end face of the peeling chamber. A negative pressure interface is formed at the end of the peeling chamber, and the negative pressure power unit is connected to the negative pressure interface through a pipeline. The lower chamber has a similar structure to the upper chamber, and each peeling group corresponds to the exit end of the condensing roller. Based on the similar chamber structure layout, and with the negative pressure cavities inside each chamber interconnected, the peeling and transfer operations formed by each condensing roller are completed under a relatively stable adsorption force.

[0013] Preferably, each stripping chamber is equipped with a negative pressure interface at both ends, wherein the negative pressure power unit is connected to the upper chamber and the lower chamber respectively through a diversion pipeline, and the negative pressure formed by the upper chamber and the lower chamber is equal. Based on the relatively balanced pressure, the fiber web is prevented from being pulled or damaged when the fiber layer passes through the adsorption end faces of different negative pressure adsorption chambers, and the synchronous movement of the fiber web and the adsorption transfer section is increased.

[0014] Furthermore, the extension direction of the strip-shaped adsorption holes at each stripping port is parallel to the length direction of the condensing roller. This ensures that the direction of the stripping force is the same, avoiding interference during stripping. Additionally, the extension direction of the strip-shaped adsorption holes at the transfer port and the stripping port is perpendicular. By restricting the extension direction of the strip-shaped adsorption holes, the stripping efficiency and quality of the fiber web from the condensing roller are improved, thereby ensuring relatively uniform force during stripping at the exit of the web.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: In the current multi-doff carding machine, a fiber web transfer section is formed between each adjacent upper and lower condensing roller. If this transfer section floats, not only does the resulting airflow affect the transfer of the fiber web by the lower condensing roller, but it also alters the tightness of the transfer section. This results in significant variations in the carding force of the lower fiber web, and insufficient fiber transfer. Consequently, the fibers adhere to the doffer carding cloth and are difficult to remove, forming stagnation points. This can further develop into neps (core hazard: disrupting fiber distribution and forming dense, hard lumps; end consequences: filter blockage / weak mechanical zones / bacterial breeding grounds) and white spots (core hazard: localized fiber loss, structural disruption). Interruptions can lead to: 1) continuous damage; 2) end-stage consequences: leakage / holes / protective failure. Simultaneously, during multi-layer laying, localized wrinkles can appear in the fiber web layer, resulting in uneven thickness of the final web layer. Furthermore, the density and strength of the fiber web are unlikely to meet processing requirements, meaning the fiber web quality suffers from serious defects. Then, regarding the use of negative pressure adsorption for some web exits, such as common moving negative pressure rollers, where adsorption is achieved through multiple adsorption points on the roller to keep the fiber web moving synchronously with the roller, each adsorption point is a circular hole, typically arranged in a ring array on the outer wall of the negative pressure roller. However, once the width of the exiting fiber layer is large (e.g., 3.6 meters, 4.2 meters, 4.5 meters...), the problem persists.(e.g., 6 meters), the negative pressure points are relatively separated, and the adsorption force in the area between two adjacent holes weakens. Therefore, this not only increases the partial warping or deformation rate of the fiber web, but also causes the fiber web to be stretched at the moment of exiting the web, resulting in a high fiber damage rate and uneven fiber stress, which seriously affects the quality of the web. In addition, some of the negative pressure points will cause interfering airflow to enter between the roller and the fiber as the fiber web moves. If this airflow is not dispersed and guided, the resulting turbulent airflow will cause the fiber web to bulge or shift relative to the negative pressure roller, resulting not only in stretching, but also in uneven thickness of the stacked web layers, which seriously affects the quality of the laminated web. The present invention addresses the shortcomings of existing structures, such as poor quality, through a layered fiber web exit structure. This structure cleverly solves these deficiencies by employing a layered fiber web exit design. With this structure, the fibers transferred from the upper condensing roller are stripped from the condensing roller at the corresponding stripping port under negative pressure and adhered to the adsorption transfer section to form an upper fiber web layer. Simultaneously, adsorption assistance is formed at the transfer port, and the upper fiber web adheres to the adsorption transfer section for synchronous transfer until the next condensing roller performs the same negative pressure stripping. The stripped fibers then form a web on the upper fiber web layer, creating a stacked web. This process is repeated to sequentially complete the web formation and stacking of multiple condensing rollers to form a stacked web layer. The stacked web layer is then fed into the web exit channel formed by the web exit transfer section and the conveyor curtain, thus completing the web exit of the stacked web layer. Therefore, this invention, on the one hand, completes the peeling of each condensing roller in stages based on the same adsorption transfer section, and based on the cooperation of pre-peeling and forward peeling, not only adjusts the uniformity and comprehensiveness of the web exit peeling force, but also reduces fiber damage or deformation. At the same time, the change in the web exit angle is more conducive to the fiber web detaching from the condensing roller, and also eliminates the uneven force on the fiber web during peeling or stacking, avoids interference between peeling and transfer, and solves the problems of insufficient fiber transfer and fiber web quality. On the other hand, without being limited by the width of the fiber web, it is based on strip adsorption... The cooperation between the stripping and transfer ports formed by the attached pores prevents warping or deformation of the fiber web during stripping or transfer. Simultaneously, the complementary vertical spacing and staggered arrangement of multiple sets of strip-shaped adsorption pores during stripping alleviates the tensile stress caused by adsorption during the even distribution of adsorption, overcoming the defects of uneven or insufficient stress on the web. Furthermore, the intersecting extension directions of the strip-shaped adsorption pores used in stripping and transfer not only fully utilize the interconnected adsorption ranges formed by the strip adsorption to increase the adhesion between the fiber web and the adsorption transfer section, but also reduce the tensile deformation rate of the fiber web between adjacent adsorption sites during airflow combing in different directions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the laminated fiber web structure in this embodiment; Figure 2 for Figure 1 A structural decomposition diagram; Figure 3 for Figure 1Front view diagram (partial structure omitted); Figure 4 for Figure 3 A top-down view; Figure 5 for Figure 4 Schematic diagram of the sectional view along the central AA direction; Figure 6 for Figure 1 A partial structural diagram of the medium and negative pressure auxiliary mechanism; Figure 7 for Figure 6 Front view diagram; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point M; Figure 9 for Figure 7 Rear view diagram; Wherein: 1. Condensation roller; 1a. Upper condensation roller; 1b. Lower condensation roller; 2. Conveyor curtain; 20. Horizontal section; 200. Connecting end; 21. Transfer section; 3. Fiber web transfer unit; 30. Transfer roller; 31. Breathable transfer belt; 310. Adsorption transfer section; 311. Web exit transfer section; 312. Connecting transfer section; 32. Negative pressure auxiliary mechanism; 320. Frame; 321. Negative pressure chamber; a. Upper chamber; b. Lower chamber; a1, b1. Stripping chamber; a2, b2. Transfer chamber; x. Strip adsorption hole; I. Stripping group; II. Transfer group; 322. Shift adjuster; 323. Moving guide rail. Detailed Implementation

[0017] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. The orientations or positional relationships indicated by terms such as "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0021] like Figures 1 to 9 As shown, the fiber web stacking structure of this embodiment includes multiple condensing rollers 1 arranged at intervals, a conveying curtain 2, and a fiber web transfer unit 3 for stacking the fiber webs transferred by each condensing roller 1 relative to each other and transferring them to the conveying curtain 2.

[0022] Specifically, there are two condensing rollers 1, which are arranged vertically and horizontally. The exit ends of the upper condensing roller 1a and the lower condensing roller 1b are aligned to form the exit end face, and the exit end face is inclined from the outside to the inside.

[0023] The conveyor curtain 2 includes a horizontal section 20 and a transfer section 21, wherein the condensing roller 1 and the fiber web transfer unit 3 are located above and to the right of the receiving end 200 of the horizontal section 20. Based on the position settings of the condensing roller 1 and the fiber web transfer unit 3 relative to the conveyor curtain, the flat laying and output of the stacked web layers are implemented more smoothly.

[0024] The fiber web transfer unit 3 includes multiple transfer rollers 30 with parallel core lines, a breathable transfer belt 31 that is ring-shaped and fitted on all the transfer rollers 30, and a negative pressure auxiliary mechanism 32. The transfer rollers 30 are three in a triangular arrangement. The breathable transfer belt 31 includes an adsorption transfer section 310 that intersects with the upper extension line of the web exit end face and protrudes from the upper and lower ends of the web exit end face, a web exit transfer section 311 that forms a stacked web exit channel with the conveyor curtain 2, and a connecting transfer section 312 for connecting the adsorption transfer section 310 and the web exit transfer section 311.

[0025] The negative pressure auxiliary mechanism 32 is located within the triangular area formed by the breathable transfer belt 31. The negative pressure auxiliary mechanism 32 includes a frame 320, a negative pressure chamber 321 mounted on the frame 320, and a negative pressure power unit. It comprises four negative pressure adsorption chambers arranged sequentially from top to bottom, based on the adsorption transfer section 310. The adsorption end faces of the four negative pressure adsorption chambers are aligned and spliced ​​to form a transfer support surface on the back of the sliding support adsorption transfer section. Simultaneously, the four negative pressure adsorption chambers are also arranged based on the positions of the upper condensation roller 1a and the lower condensation roller 1b, and are divided into an upper chamber a and a lower chamber b. The upper chamber a includes a peeling chamber a1 and a transfer chamber a2 that are connected and arranged vertically. The lower chamber b has a similar structure to the upper chamber a, but the layout is different. That is, the lower chamber b also has a corresponding stripping chamber b1 and a transfer chamber b2. In other words, the four negative pressure adsorption chambers are, from top to bottom, stripping chamber a1, transfer chamber a2, transfer chamber b2, and stripping chamber b1. The stripping chamber a1 and the transfer chamber a2 are connected, and the transfer chamber b2 and the stripping chamber b1 are connected.

[0026] In some specific embodiments, the negative pressure adsorption chambers of stripping chamber a1, transfer chamber a2, transfer chamber b2, and stripping chamber b1 are provided with one or more sets of strip-shaped adsorption holes x arranged at intervals and extending in the same direction. The strip-shaped adsorption holes x on the adsorption end faces of the four negative pressure adsorption chambers are divided into stripping group I and transfer group II based on stripping and transfer. Stripping group I corresponds to the end of the web exit of the coagulation roller, and the stripping port is formed by the vertical spacing and staggered complementarity between the multiple sets of strip-shaped adsorption holes x. Transfer group II is located on the adsorption end face of the negative pressure adsorption chamber between every two adjacent stripping ports. The extension direction of the strip-shaped adsorption holes x in transfer group II is the same as the movement direction of the fiber web to form a transfer port, and the extension directions of the strip-shaped adsorption holes in the transfer port and the stripping port intersect.

[0027] In this example, two sets of strip-shaped adsorption holes x are formed on both stripping chambers a1 and b1. These two sets of strip-shaped adsorption holes x are spaced vertically and staggered to complement each other, forming the stripping port. The extension direction of the strip-shaped adsorption holes x is the same as the axial direction of the condensing roller. These two sets of strip-shaped adsorption holes x also constitute stripping group I. Similarly, a set of strip-shaped adsorption holes x is formed on both transfer chambers a2 and b2. The extension direction of the strip-shaped adsorption holes x is the same as the fiber web movement direction, forming the transfer port. This set of strip-shaped adsorption holes x constitutes transfer group II. In short, the extension directions of the strip-shaped adsorption holes at the transfer port and the stripping port are perpendicular.

[0028] Specifically, the two sets of strip-shaped adsorption holes at the stripping port are divided into a main adsorption stripping section and an auxiliary adsorption stripping section. The main adsorption stripping section is aligned with the exit end of the condensing roller to form a forward stripping perpendicular to the tangential output direction. The auxiliary adsorption stripping section is located above the main adsorption stripping section to form a pre-stripping. The pre-stripping changes the output direction of the fiber web to reduce the angle and instantaneous adsorption force of the forward stripping. During the stripping process at the exit of each condensing roller, the cooperation of pre-stripping and forward stripping not only adjusts the uniformity and comprehensiveness of the stripping force but also reduces fiber damage or deformation. Furthermore, the change in the exit angle facilitates the detachment of the fiber web from the condensing roller. Both the main and auxiliary adsorption stripping sections have a set of strip-shaped adsorption holes. Each set of strip-shaped adsorption holes has an equal length, ranging from 5 to 25 mm, with the spacing between adjacent strip-shaped adsorption holes being less than the length of each hole. Generally, the length of the strip-shaped adsorption holes is about 10-20mm. The spacing between them is shorter than the length of each strip-shaped adsorption hole. This primarily controls the adsorption force between adjacent strip-shaped adsorption holes to be relatively uniform, reducing warping or deformation and enabling the formation of the desired quality fiber web. Also, see again... Figure 7 and Figure 8In the orthographic projection of each stripping port, the strip-shaped adsorption holes of the auxiliary adsorption stripping section are the upper adsorption holes, and the strip-shaped adsorption holes of the main adsorption stripping section are the lower adsorption holes. An upper adsorption hole is positioned between every two adjacent lower adsorption holes. The centers of one upper adsorption hole and the two lower adsorption holes form an isosceles triangle with an obtuse angle at the apex. This complementary arrangement of the upper and lower adsorption holes improves adsorption uniformity. Furthermore, the obtuse angle (generally 150°~170°) allows control of the spacing between the upper and lower adsorption holes, achieving the desired stripped web quality. In this example, the obtuse angle is 164°. Each stripping chamber a1 has negative pressure interfaces at both ends. The negative pressure generator is connected to the upper chamber a and the lower chamber b via a branch pipeline, and the negative pressures formed by the upper chamber a and the lower chamber b are equal. This relatively balanced pressure prevents the fiber layer from being pulled or damaged when passing through the adsorption ends of different negative pressure adsorption chambers, increasing the synchronous movement of the fiber web and the transfer section. Of course, two negative pressure generators can also be used to control the pressure of the upper chamber a and the lower chamber b respectively, and the resulting negative pressure can be adjusted adaptively according to actual needs.

[0029] Specifically, the strip-shaped adsorption holes x at the transfer port are aligned vertically. This means the transfer port primarily aims to achieve balanced adsorption and maintain synchronous movement between the fiber web and the exit transfer section. The directional setting also reduces the displacement rate of the fiber web relative to the exit transfer section (mainly by reducing the displacement of the fiber web relative to the exit transfer section caused by airflow during movement). In this example, each negative pressure adsorption chamber adsorption end face located between every two adjacent stripping ports forms a transfer port, with adjacent transfer ports aligned. This vertical and horizontal alignment not only eliminates the relative pulling and displacement of the fiber web that may occur between adjacent transfer ports but also ensures smoother transfer and reduces the warping or deformation rate of the fiber web. Furthermore, there are N negative pressure adsorption chambers, where N is an even number ≥ 2, and the negative pressure adsorption chamber of each stripping port is connected to the negative pressure adsorption chamber of the adjacent transfer port. This not only satisfies the number of negative pressure chambers required for stripping and transfer but also creates relatively balanced negative pressure, facilitating implementation and reducing manufacturing and usage costs. In this example, N = 2, corresponding to the aforementioned transfer chambers a2 and b2. It should then be noted that the position of the strip adsorption hole x at the stripping port is aligned with the upper condensing roller 1a and the lower condensing roller 1b.

[0030] Furthermore, a shift adjuster 322 is provided on the conveyor curtain 2, with a frame 320 mounted on it. The shift adjuster 322 adjusts the distance between the adsorption transfer section 310 and the exit end face. The frame 320 is triangular, and a moving guide rail 323 is provided on the conveyor curtain 2. The frame 320 is slidably mounted on the moving guide rail 323 from the bottom. The shift adjuster 322 is a linear actuator (e.g., a commonly used telescopic rod or linear mechanical transmission). That is, the position can be adjusted simply by pushing the frame 320 along the moving guide rail 323. In short, adaptive adjustments and settings are made based on different exit thicknesses to increase the practicality of the exit structure. At the same time, the transfer support surface is parallel and attached to the adsorption transfer section 310, and as the thickness of the multi-layered fiber web increases, the distance between the multiple exit ends from top to bottom and the transfer support surface gradually increases. The angle between the adsorption transfer section and the exit end face can be set based on the increase in the layer thickness, thereby further increasing the practicality of the exit structure. The thickness of the fiber web gradually increases along the output direction between the output transfer section 311 and the conveyor curtain 2. Based on the inclined angle formed by the output transfer section, it not only facilitates the separation of the fiber web from the breathable transfer belt, but also more smoothly adheres to the conveyor curtain to complete the output transfer.

[0031] Specifically, the implementation process of this embodiment is as follows: At the corresponding stripping port, the fibers on the condensing roller are stripped by negative pressure and attached to the adsorption transfer section to form an upper fiber web layer. At the same time, in the adsorption assistance at the transfer port, the upper fiber web is synchronously transferred to the adsorption transfer section until the next condensing roller performs the same negative pressure stripping. Then the stripped fibers are formed into a web on the upper fiber web layer and form a stacked web. Then the above process is repeated to complete the web formation and stacking of multiple condensing rollers to form a stacked web layer. The stacked web layer is then sent into the web exit transfer section and the web exit channel formed by the conveyor curtain to complete the web exit of the stacked web layer.

[0032] That is, based on the double doffer carding machine, it completes the layering and stacking of the web in the same adsorption and transfer section, and completes the stacking with high quality and high efficiency. Then, it is smoothly transferred to the conveyor curtain by the air transfer belt to complete the entire web output action (not using the negative pressure roller method).

[0033] In summary, this invention, on the one hand, completes the peeling of each coagulation roller in stages based on the same adsorption transfer section and stacks them with the adsorption transfer section as the reference. This not only eliminates the uneven stress on the fiber web during peeling or stacking but also avoids fiber web transfer interference caused by peeling and transfer, thereby solving the problems of insufficient fiber transfer and fiber web quality. On the other hand, without being limited by the width of the fiber web, the cooperation between the peeling port and the transfer port formed by the strip adsorption holes avoids warping or deformation of the fiber web during peeling or transfer. At the same time, the cooperation formed by the vertical spacing and staggered complementarity between multiple sets of strip adsorption holes during peeling alleviates the adsorption transient in the strip adsorption even distribution mode. The tension generated between the strips overcomes the defects of uneven or insufficient force on the web. Simultaneously, based on the intersecting extension directions of the strip-shaped adsorption holes used in peeling and transfer, it not only fully utilizes the interconnected adsorption ranges formed by the strip adsorption to increase the adhesion between the fiber web and the adsorption transfer section, but also reduces the tensile deformation rate of the fiber web between adjacent adsorption sites during airflow combing in different directions. Thirdly, the extension direction of the strip-shaped adsorption holes at each peeling port is parallel to the length direction of the condensing roller, ensuring that the direction of the peeling force is the same, avoiding interference during peeling. Furthermore, the extension directions of the strip-shaped adsorption holes at the transfer port and peeling port are perpendicular. The restriction of the extension direction of the strip-shaped adsorption holes improves the fiber web stripping efficiency and quality in the self-coalescing roller, thereby ensuring relatively uniform force during web stripping. Fourthly, the multiple sets of strip-shaped adsorption holes at each stripping port are divided into a main adsorption stripping section and an auxiliary adsorption stripping section. The main adsorption stripping section is aligned with the web exit end of the coalescing roller to form a forward stripping perpendicular to the tangential output direction. The auxiliary adsorption stripping section is located above the main adsorption stripping section to form a pre-stripping. The pre-stripping changes the output direction of the fiber web to reduce the angle and instantaneous adsorption force of the forward stripping. During the web stripping process of each coalescing roller, based on the cooperation of pre-stripping and forward stripping, not only is the uniformity and comprehensiveness of the web stripping force adjusted, but also… Furthermore, it reduces fiber damage or deformation, and the change in the exit angle is more conducive to the fiber web detaching from the coagulation roller; fifthly, both the main adsorption stripping section and the auxiliary adsorption stripping section have a set of strip-shaped adsorption holes, each set of strip-shaped adsorption holes is of equal length and the length is 5~25mm, wherein the interval between two adjacent strip-shaped adsorption holes is less than the length of each strip-shaped adsorption hole. Generally, the length of the strip-shaped adsorption hole is about 10~20mm. As for the interval being less than the length of each strip-shaped adsorption hole, it mainly controls the adsorption force between two adjacent strip-shaped adsorption holes to be relatively uniform, which not only reduces warping or deformation rate, but also enables the stripping of fiber web of the required quality;Simultaneously, in the orthographic projection of each stripping port, the strip adsorption holes of the auxiliary adsorption stripping section are the upper adsorption holes, and the strip adsorption holes of the main adsorption stripping section are the lower adsorption holes. An upper adsorption hole is arranged between every two adjacent lower adsorption holes. The centers of one upper adsorption hole and the two lower adsorption holes form an isosceles triangle with an obtuse angle at the apex. This complementary arrangement of the upper and lower adsorption holes improves adsorption uniformity. Furthermore, the obtuse angle (generally 150°~170°) allows control of the spacing between the upper and lower adsorption holes, thereby achieving the desired screen quality. Sixthly, each negative pressure adsorption chamber adsorption end face located between every two adjacent stripping ports forms a transfer port, and the strip adsorption holes of the transfer port are vertically aligned. The main purpose of the transfer ports is to achieve balanced adsorption and maintain synchronous movement between the fiber web and the exit transfer section. Simultaneously, the directional setting reduces the displacement rate of the fiber web relative to the exit transfer section (primarily reducing the displacement of the fiber web relative to the exit transfer section caused by airflow during movement). Furthermore, each negative pressure adsorption chamber adsorption end face located between every two adjacent stripping ports forms a transfer port. The aligned layout between adjacent transfer ports, i.e., based on vertical and horizontal alignment, not only eliminates the relative pulling and displacement of the fiber web that may be caused by adjacent transfer ports, but also ensures smoother transfer, relatively reducing the warping or deformation rate of the fiber web. At least N negative pressure adsorption chambers are formed between every two stripping ports, where N is an even number ≥ 2, and each stripping port is located in… The negative pressure adsorption chambers at the top and bottom are connected, ensuring that the number of negative pressure chambers meets the requirements for stripping and transfer, and that the resulting negative pressure is relatively balanced. This also facilitates implementation and reduces manufacturing and usage costs. Seventhly, based on a similar chamber structure layout, and with the negative pressure chambers within each chamber interconnected, the stripping and transfer processes formed by each condensing roller are completed under a relatively stable adsorption force. Simultaneously, the negative pressures formed by the upper and lower chambers are equal. This relatively balanced pressure avoids pulling or damage to the fiber web when the fiber layer passes through the adsorption end faces of different negative pressure adsorption chambers, increasing the synchronous movement of the fiber web and the transfer section. Eighthly, a shift adjuster is provided on the conveyor curtain, with the frame mounted on the shift adjuster, and based on… The shift adjuster adjusts the interval distance between the adsorption transfer section and the exit end face, and makes adaptive adjustments and settings based on different exit thicknesses to increase the practicality of the exit structure. At the same time, the upper and lower ends of the transfer support surface cover the entire exit end face, ensuring that the web formation and stacking are completed on the same transfer support surface, that is, the reference is the same, thus providing conditions for high-quality web exit. Ninthly, the exit thickness formed between the exit transfer section and the conveyor curtain along the exit direction gradually increases. Based on the tilt angle formed by the exit transfer section, it is not only conducive to the separation of the fiber web from the breathable transfer belt, but also to more smoothly adhere to the conveyor curtain to complete the exit transfer. At the same time, based on the position setting of the condensing roller and the fiber web transfer unit relative to the conveyor curtain, the flat laying and exit of the stacked web layer is implemented more smoothly.The tenth aspect, based on the double-dough carding machine, involves completing the layered web output and stacking actions within the same adsorption and transfer section, achieving high-quality and high-efficiency stacking. The web is then smoothly transferred to the conveyor curtain via the air-permeable transfer belt to complete the entire output process (not using a negative pressure roller). Simultaneously, the condensing roller and fiber web transfer unit are located on the upper right side of the horizontal section's receiving end. Based on the relative positions of the condensing roller and fiber web transfer unit to the conveyor curtain, the flat laying and output of the stacked web layers is implemented more smoothly.

[0034] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A fiber web transfer unit with a fiber web stacked output structure, used to stack and transfer the fiber webs transferred by each condensing roller to a conveyor curtain, characterized in that: The fiber web transfer unit includes multiple transfer rollers with parallel core axes, a breathable transfer belt ring-shaped and mounted on some or all of the transfer rollers, and a negative pressure auxiliary mechanism. The negative pressure auxiliary mechanism includes a frame, a negative pressure chamber mounted on the frame, and a negative pressure power unit. The negative pressure chamber has multiple negative pressure adsorption chambers arranged sequentially from top to bottom. The adsorption end faces of these chambers are aligned and spliced ​​to form a sliding support adsorption surface on the back of the breathable transfer belt. Each negative pressure adsorption chamber has one or more sets of strip-shaped adsorption holes spaced apart and extending in the same direction on its adsorption end face. These strip-shaped adsorption holes are divided into stripping groups and transfer groups. Each condensing roller has corresponding stripping and transfer groups. The stripping group is based on... Multiple sets of strip-shaped adsorption holes are spaced vertically and staggered to complement each other to form peeling ports. Each peeling port has multiple sets of strip-shaped adsorption holes, which are divided into a main adsorption peeling part and an auxiliary adsorption peeling part. The main adsorption peeling part is aligned with the end of the condensing roller to form a positive peeling perpendicular to the tangential output direction. The auxiliary adsorption peeling part is located above the main adsorption peeling part to form a pre-peeling. The pre-peeling changes the output direction of the fiber web to reduce the angle and instantaneous adsorption force of the positive peeling. The extension direction of the strip-shaped adsorption holes in the transfer group is the same as the movement direction of the fiber web. Each negative pressure adsorption chamber adsorption end face located between every two adjacent peeling ports forms a transfer port, and the extension direction of the strip-shaped adsorption holes in the transfer port and the peeling port intersects.

2. The fiber web transfer unit of the fiber web laminated output structure according to claim 1, characterized in that: Both the main adsorption stripping section and the auxiliary adsorption stripping section have a set of strip-shaped adsorption pores. The distance between two adjacent strip-shaped adsorption pores in each set of strip-shaped adsorption pores is less than the length of each strip-shaped adsorption pore.

3. The fiber web transfer unit of the fiber web laminated output structure according to claim 2, characterized in that: Each group of strip-shaped adsorption pores has the same length, ranging from 5 to 25 mm.

4. The fiber web transfer unit of the fiber web laminated output structure according to claim 2 or 3, characterized in that: In the orthographic projection of each stripping port, the strip adsorption holes of the auxiliary adsorption stripping section are the upper adsorption holes, and the strip adsorption holes of the main adsorption stripping section are the lower adsorption holes. An upper adsorption hole is arranged between every two adjacent lower adsorption holes. The centers of one upper adsorption hole and two lower adsorption holes form an isosceles triangle, and the vertex angle of the isosceles triangle is obtuse.

5. The fiber web transfer unit of the fiber web laminated output structure according to claim 1, characterized in that: The strip-shaped adsorption holes of the transfer port are aligned vertically; and / or, adjacent transfer ports are aligned in a layout.

6. The fiber web transfer unit of the fiber web laminated output structure according to claim 5, characterized in that: At least N negative pressure adsorption chambers are formed between every two stripping ports, where N is an even number ≥ 2, and the negative pressure adsorption chambers of each stripping port are connected to the negative pressure adsorption chambers of the adjacent transfer ports.

7. The fiber web transfer unit of the fiber web laminated output structure according to claim 6, characterized in that: The negative pressure auxiliary mechanism includes a frame, a negative pressure chamber mounted on the frame, and a negative pressure power unit. The negative pressure chamber is divided into an upper chamber and a lower chamber based on the layout of two adjacent condensing rollers. The upper chamber includes a stripping chamber and a transfer chamber that are connected and arranged vertically. The transfer port is located on the adsorption end face of the transfer chamber, and the stripping port is located on the adsorption end face of the stripping chamber. A negative pressure interface is formed at the end of the stripping chamber. The negative pressure power unit is connected to the negative pressure interface through a pipeline. The lower chamber has a similar structure to the upper chamber, and each stripping group corresponds to the screen exit end of the condensing roller.

8. The fiber web transfer unit of the fiber web laminated output structure according to claim 7, characterized in that: Each stripping chamber is equipped with a negative pressure interface at both ends. The negative pressure power unit is connected to the upper chamber and the lower chamber respectively through the diversion pipeline, and the negative pressure formed by the upper chamber and the lower chamber is equal.

9. The fiber web transfer unit of the fiber web laminated output structure according to claim 1, characterized in that: The strip-shaped adsorption holes at each stripping port extend in a direction parallel to the length of the condensation roller.

10. The fiber web transfer unit of the fiber web laminated output structure according to claim 1, characterized in that: The extension directions of the strip-shaped adsorption holes at the transfer port and the stripping port are perpendicular.

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