A multi-fineness bamboo fiber and impurity screening device

Abstract

The present invention discloses a multi-fineness bamboo fiber and impurity screening device, comprising an impurity centrifugal unit, a multi-fineness bamboo fiber coarse screening unit, a multi-fineness bamboo fiber fine screening unit, and a screening transmission unit. The impurity centrifugal unit is used to separate bamboo fibers from impurities by centrifugal force. The multi-fineness bamboo fiber coarse screening unit is used to comb the bamboo fibers neatly and screen out bamboo fibers with a diameter smaller than a predetermined value for the coarse screening, and then transport the screened bamboo fibers to the multi-fineness bamboo fiber fine screening unit. The multi-fineness bamboo fiber fine screening unit is used to perform a secondary screening on the bamboo fibers, screen out bamboo fibers with a diameter smaller than a predetermined value for the fine screening, and then transport the screened bamboo fibers to the screening transmission unit. The screening transmission unit is used to comb the bamboo fibers neatly and then transport them to a predetermined location. The present invention has the advantages of being able to efficiently screen impurities and bamboo fibers of different finenesses, and the screening is accurate and of high quality.

Description

Technical Field

[0001] The invention relates to the technical field of screening equipment, in particular to a multi-fineness bamboo fiber and impurity screening device. Background Art

[0002] Bamboo fiber is a regenerated plant fiber extracted from bamboo. It is the fifth largest natural fiber used by humans after cotton, linen, wool and silk. Compared with inorganic reinforcing fibers such as glass fiber and basalt fiber used in traditional composite materials, bamboo fiber has low density, wide sources, energy saving and environmental protection, as well as good processing, sound absorption and damping properties. In addition, the production process of bamboo fiber determines that less waste is generated, the pollution to the environment is small, and the product can be directly degraded in the environment after being discarded without any harm. Therefore, it is a truly green and environmentally friendly material. "The research and development of bamboo fiber special-shaped composite material manufacturing technology and complete sets of equipment will help to realize the multi-standard and multi-functionalization of bamboo fiber composite materials, and promote their application and development in high-end fields of green composite materials such as cable protection tubes, healthy air ducts, complex environment pipelines, and automotive linings.

[0003] Currently, bamboo fiber production processes include mechanical fibrillation, steam explosion, and rolling and kneading. The bamboo fibers obtained through these methods are uneven in thickness and contain a high level of impurities. Existing screening devices typically use vibration screening and airflow screening, and these two methods are primarily used for powder screening. Currently, there is a lack of devices that can screen fibers based on fiber size. Therefore, there is an urgent need for a device that can efficiently separate impurities and fibers of varying fineness. Summary of the Invention

[0004] The object of the present invention is to provide a multi-fineness bamboo fiber and impurity screening device to overcome the shortcomings of the background technology.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0006] A multi-fineness bamboo fiber and impurity screening device comprises an impurity centrifugal unit, a multi-fineness bamboo fiber coarse screening unit, a multi-fineness bamboo fiber fine screening unit and a screening and conveying unit, wherein the impurity centrifugal unit is used to separate bamboo fibers and impurities by centrifugal force, the impurity centrifugal unit conveys the bamboo fibers to the multi-fineness bamboo fiber coarse screening unit, the multi-fineness bamboo fiber coarse screening unit is used to comb the bamboo fibers neatly and screen out bamboo fibers with a diameter smaller than a predetermined value of the coarse screening, and convey the screened bamboo fibers to the multi-fineness bamboo fiber fine screening unit, the multi-fineness bamboo fiber fine screening unit is used to perform secondary screening on the bamboo fibers, screen out bamboo fibers with a diameter smaller than a predetermined value of the fine screening, and convey the screened bamboo fibers to the screening and conveying unit, and the screening and conveying unit is used to comb the bamboo fibers neatly and convey them to a predetermined position.

[0007] To optimize the technical solution, further improvements include:

[0008] The above-mentioned impurity centrifugal unit includes an outer box body and an inner box body. The inner box body is placed in the outer box body. A feed port is provided on the top of the outer box body. The feed port passes through the outer box body and is connected to the inner box body. An impurity discharge port is provided on the lower half of the outer box body, and a drop port is provided on the bottom. The side wall of the inner box body is made of a filter screen. A turntable is provided at the bottom of the inner box body. The turntable can rotate under the drive of a motor. Bamboo fibers and impurities can enter the inner box body from the feed port. The turntable can rotate so that the impurities contacting the turntable pass through the filter screen due to centrifugal force and enter the outer box body.

[0009] The turntable is provided with an openable and closable drop hole, which is aligned with the drop opening. When the drop hole is opened, the bamboo fibers on the turntable can drop into the drop opening through the drop hole.

[0010] The impurity discharge port is connected to an air pump for generating negative pressure on the outer box.

[0011] The above-mentioned multi-fineness bamboo fiber coarse screening unit includes a screening box, a fiber conveyor belt, a combing plate, a fine fiber filter, a coarse fiber discharge port and a hinge. The lower end of the discharge port is connected to the screening box. Two rotating wheels are installed in the screening box. The fiber conveyor belt is wound around the rotating wheels. One of the rotating wheels is connected to a driving motor. The combing plate is arranged near the upper surface of the fiber conveyor belt. The combing plate is equipped with comb teeth. The comb teeth are in contact with the surface of the fiber conveyor belt. The bamboo fiber can fall onto the fiber conveyor belt through the discharge port. The fiber conveyor belt can carry the bamboo fiber. The fibers pass through the gaps between the teeth of the comb, which comb the bamboo fibers neatly. Then the fiber conveyor belt drops the bamboo fibers vertically onto the fine fiber filter. The bottom plate of the screening box is the fine fiber filter. The hinged end of the fine fiber filter is hinged to the bottom of the screening box through a hinge. The free end of the fine fiber filter fits in the gap between the sides of the screening box. The gap is the coarse fiber discharge port. The fine fiber filter is tilted, and the free end of the fine fiber filter is lower than the hinged end of the fine fiber filter. The mesh size of the fine fiber filter is the preset value for the coarse screen.

[0012] The fine fiber filter is connected to a vibration motor, which can drive the fine fiber filter to vibrate.

[0013] The above-mentioned multi-fineness bamboo fiber fine screening unit includes an upper blanking plate and a lower blanking plate stacked up and down, the upper blanking plate is provided with an upper blanking plate mesh opening that passes through up and down, and the lower blanking plate is provided with a lower blanking plate mesh opening that passes through up and down, the upper blanking plate mesh opening and the lower blanking plate mesh opening are aligned up and down, the upper blanking plate is installed below the fine fiber filter, the upper blanking plate mesh opening matches the mesh of the fine fiber filter, the lower blanking plate mesh opening gradually shrinks downward, and the width of the lower end of the lower blanking plate mesh opening is the predetermined value for fine screening.

[0014] The upper surface of the above-mentioned drop plate is set at an angle. The mesh opening of the drop plate penetrates the drop plate up and down, and also penetrates the side of the drop plate with a lower height to form a sliding outlet. Bamboo fibers with a diameter greater than the predetermined value of the fine screening can slide out from the sliding outlet through the mesh opening of the drop plate.

[0015] The above-mentioned screening and conveying unit includes a screening conveyor belt and a cover plate. The screening conveyor belt is wound around two rotating wheels driven by a motor. The mesh opening of the drop plate is arranged directly above the screening conveyor belt. The surface of the screening conveyor belt is provided with a plurality of grooves extending along the axial direction of the screening conveyor belt. The width of the groove is the same as the predetermined value of the fine screening. The cover plate is arranged on the upper surface of the screening conveyor belt. The lower end of the cover plate is closely matched with the upper surface of the screening conveyor belt. The cover plate is used to prevent the bamboo fibers that are not in the grooves from passing through. One end of the screening conveyor belt is docked with the predetermined position for receiving bamboo fibers.

[0016] The above-mentioned screening and conveying unit also includes a bottom plate, which is installed near the screening conveyor belt. The surface of the bottom plate is provided with a material withdrawal rib, which can extend into the groove.

[0017] The present invention can achieve the screening of impurities in bamboo fibers and bamboo fibers of different finenesses through three consecutive processes. The impurities in the scattered bamboo fibers can be separated by the filter screen into an outer box through a turntable and an inclined filter screen, and then transported to the outside through an impurity discharge port; the remaining bamboo fibers enter a combing device composed of a fiber conveyor belt and a combing plate through a blanking port. The originally disordered bamboo fibers are arranged in the same direction by the action of the combing plate, and finally fall neatly into a fine fiber filter screen to achieve preliminary separation of coarse and fine bamboo fibers; finally, the fine fibers that have been preliminarily screened enter a fine screening unit. Fibers with large diameters cannot pass through the lower blanking plate and slide along the net opening of the lower blanking plate to the outside. Fine fibers that meet the requirements will enter the groove inside the screening conveyor belt and be transported to a predetermined position for receiving bamboo fibers. Therefore, the present invention has the advantages of being able to efficiently screen impurities and bamboo fibers of different finenesses, and the screening is accurate and of high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 This is a top view of the inner box of the present invention;

[0021] Figure 4 This is a schematic diagram of the blanking port structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the fine fiber filter of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the screening conveyor belt of the present invention;

[0024] Figure 7 This is an overall schematic diagram of the fine screening device of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the lower blanking plate of the present invention;

[0026] Figure 9 This is a schematic diagram of the bottom plate structure of the present invention;

[0027] Among them: 1. Outer box; 2. Inner box; 3. Feed inlet; 4. Filter screen; 5. Turntable; 6. Impurity discharge port; 7. Dropping port; 8. Screening box; 9. Fiber conveyor belt; 10. Carding plate; 11. Fine fiber filter screen; 12. Coarse fiber discharge port; 13. Hinge; 14. Upper drop plate; 15. Lower drop plate; 16. Screening conveyor belt; 17. Cover plate; 18. Bottom plate; 19. Groove; 20. Upper drop plate mesh port; 21. Slide outlet; 22. Material withdrawal rib; 23. Dropping hole; 24. Lower drop plate mesh port. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application.

[0029] Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0030] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0031] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by persons of ordinary skill in the art to which this application belongs. The terms "a," "an," "an," "the," and similar expressions used herein do not denote limitations on quantity and may refer to either the singular or the plural. The terms "comprise," "include," "have," and any variations thereof, used herein, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements (units) is not limited to the listed steps or elements but may also include steps or elements not listed, or may include other steps or elements inherent to the process, method, product, or apparatus. The terms "connected," "connected," "coupled," and similar expressions used herein are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. The terms "plurality" and "several" used herein refer to two or more. "And / or" describes an association between associated objects, indicating that three possible relationships exist. For example, "A and / or B" may mean: A exists alone; A and B exist simultaneously; or B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0032] Combined with attachment Figures 1 to 9 A multi-fineness bamboo fiber and impurity screening device includes an impurity centrifugal unit, a multi-fineness bamboo fiber coarse screening unit, a multi-fineness bamboo fiber fine screening unit and a screening and conveying unit. The impurity centrifugal unit includes an outer box body 1, an inner box body 2, a feed port 3, a filter screen 4, a turntable 5, an impurity discharge port 6, a drop port 7 and other structures.

[0033] The multi-fineness bamboo fiber coarse screening unit includes a screening box 8, a fiber conveyor belt 9, a carding plate 10, a fine fiber filter 11, a coarse fiber discharge port 12 and a hinge 13.

[0034] The multi-fineness bamboo fiber fine screening unit includes two main structures: an upper blanking plate 14 and a lower blanking plate 15 stacked up and down;

[0035] The screening conveying unit includes a screening conveyor belt 16 , a cover plate 17 and a bottom plate 18 .

[0036] The inner box body 2 is a hollow box body. The inner box body 2 and the outer box body 1 are separated by a filter screen 4. The feed port is directly connected to the interior of the inner box body 2. The turntable 5 is located at the bottom of the inner box body 2. The impurity discharge port 6 is fixedly connected to the outer box body 1.

[0037] The fiber conveyor belt 9 and the combing plate 10 are located inside the screening box 8. Two pairs of rollers jointly drive the movement of the fiber conveyor belt 9. The combing plate 10 is fixed above the rollers. The comb teeth are evenly arranged on the combing plate 10. The left opening of the coarse screening box 8 is provided with a coarse fiber discharge port 12. The blanking plate is located below the fine fiber filter 11.

[0038] The mesh of the filter 4 is square and larger than the size of the impurities. The filter 4 forms a certain angle with the bottom of the inner box 2 and is inclined to the ground, which solves the problem of mesh port blockage.

[0039] There is a certain gap between the turntable 5 and the blanking opening 7 at the bottom of the inner box body 2. The turntable 5 can rotate under the drive of the motor. An arc-shaped guide plate is provided on the surface of the turntable 5, and a circular blanking opening 7 is opened in the center.

[0040] The drop opening 7 is funnel-shaped, with a circular top and a long rectangular bottom, to ensure that the bamboo fibers fall onto the fiber conveyor belt 9 of the fiber coarse screening device in an orderly manner.

[0041] The carding plate 10 is arc-shaped, and comb teeth are installed on the inner surface of the carding plate 10. The interval between the two rows of comb teeth should not be less than the maximum diameter of a single coarse fiber. The roller can rotate around the axis to drive the fiber conveyor belt 9 to move. The carding plate 10 is fixed above the fiber conveyor belt 9 by pins.

[0042] The fine fiber filter 11 is arranged at the bottom of the coarse screening box 8. The mesh shape of the filter 4 is long strips. The spacing between the strips should be slightly larger than the diameter of the fine bamboo fiber and should be smaller than the diameter of the coarse bamboo fiber. The fine fiber filter 11 is obliquely connected to the fiber coarse screening box 8 through a movable hinge 13. It can achieve a certain amplitude of vibration under the action of the motor to avoid coarse fibers clogging the mesh opening.

[0043] The blanking plate consists of two parts, the upper blanking plate 14 has a parallelogram cross-section and is connected to the fine fiber filter 11, and the lower blanking plate 15 has a trapezoidal cross-section and is connected to the screening conveyor belt 16; both blanking plates have long strip blanking openings 7 inside, and the position of the mesh openings matches the mesh of the fine fiber filter 11.

[0044] The blanking opening 7 inside the lower blanking plate 15 is a segmented structure, with the aperture gradually decreasing from top to bottom. A sliding opening 21 is provided on the left side to slide the coarse fibers to the outside at an inclined angle.

[0045] During use, the multi-fineness bamboo fiber and impurity screening device of the present invention places the dispersed bamboo fibers into the feed port 3. Under the influence of gravity, the bamboo fibers automatically fall along the feed port 3 into the inner housing 2. Upon contacting the rotating turntable 5, the bamboo fibers are further dispersed and, under the action of centrifugal force, are driven toward the surrounding filter screens 4. At this point, impurities, under the influence of centrifugal force, pass through the filter screens 4 into the outer housing 1 and are sucked out of the outer housing 1 by an air pump through the impurity discharge port 6. The bamboo fibers then fall along the inclined filter screens 4 onto the turntable 5 again, repeating the above process, achieving multiple screenings. After all impurities have been screened out, the turntable 5 is closed, allowing the bamboo fibers to pass through the dropout holes 23 and dropout port 7 on the turntable 5 and enter the coarse screening housing 8. The fallen bamboo fibers first pass through the fiber conveyor belt 9, and are driven by the fiber conveyor belt 9 to enter the combing device composed of the combing plate 10, which can comb the bamboo fibers into a neatly arranged state, and finally fall vertically into the fine fiber filter 11. By adjusting the speed of the fiber conveyor belt 9, the falling amount of the fibers can be controlled to avoid excessive fibers clogging the filter 4, while the coarser bamboo fibers slide out from the coarse fiber discharge port 12 through the vibration and tilt angle of the fine fiber filter 11 to prevent clogging the fine fiber filter 11. The fibers that have been preliminarily screened pass through the inside of the blanking plate. The coarse fibers that do not meet the diameter will first be stuck in the mesh opening, and then slide to the sliding outlet 21 through the inclined lower blanking plate 15, and then move to the outside. The fibers that meet the diameter enter the groove 19 of the screening conveyor belt 16 through the gradually shrinking mesh openings in the upper and lower blanking plates, and are transported to the other side of the cover plate 17 for collection after passing through the screening conveyor belt 16 and the cover plate 17. The material removal ribs 22 on the surface of the bottom plate 18 can clean up the fine fibers stuck in the groove 19 and unable to fall off.

[0046] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A device for screening bamboo fibers of various finenesses and impurities, characterized by: The invention comprises an impurity centrifugal unit, a multi-fineness bamboo fiber coarse screening unit, a multi-fineness bamboo fiber fine screening unit and a screening transmission unit, wherein the impurity centrifugal unit is used to separate bamboo fibers and impurities by centrifugal force, and the impurity centrifugal unit transports the bamboo fibers to the multi-fineness bamboo fiber coarse screening unit, and the multi-fineness bamboo fiber coarse screening unit is used to comb the bamboo fibers neatly and screen out bamboo fibers with a diameter smaller than a predetermined value of the coarse screening, and transport the screened bamboo fibers to the multi-fineness bamboo fiber fine screening unit, and the multi-fineness bamboo fiber fine screening unit is used to perform secondary screening on the bamboo fibers, screen out bamboo fibers with a diameter smaller than a predetermined value of the fine screening, and transport the screened bamboo fibers to the screening transmission unit, and the screening transmission unit is used to The raw fibers are combed neatly and transported to a predetermined position; the multi-fineness bamboo raw fiber coarse screening unit comprises a screening box (8), a fiber conveyor belt (9), a combing plate (10), a fine fiber filter (11), a coarse fiber discharge port (12) and a hinge (13); the lower end of the drop port (7) is connected to the screening box (8); two rotating wheels are installed in the screening box (8); the fiber conveyor belt (9) is wound around the rotating wheels, one of the rotating wheels is connected to a driving motor; the combing plate (10) is arranged near the upper surface of the fiber conveyor belt (9); the combing plate (10) is provided with comb teeth, the comb teeth are in contact with the surface of the fiber conveyor belt (9), and the bamboo raw fibers can fall onto the fiber conveyor belt (9) through the drop port (7). The fiber conveyor belt (9) can carry bamboo fibers through the tooth gaps of the comb teeth, and the tooth gaps comb the bamboo fibers passing through neatly. Then, the fiber conveyor belt (9) drops the bamboo fibers vertically onto the fine fiber filter (11). The bottom plate of the screening box (8) is the fine fiber filter (11). The hinged end of the fine fiber filter (11) is hinged to the bottom of the screening box (8) through a hinge (13). The free end of the fine fiber filter (11) is matched with the side gap of the screening box (8). The gap is the coarse fiber discharge port (12). The fine fiber filter (11) is tilted, and the free end of the fine fiber filter (11) is lower than the hinged end of the fine fiber filter (11). The fine fiber filter (11) is provided at an angle. 1) is a predetermined value for coarse screening, and the multi-fineness bamboo fiber fine screening unit includes an upper blanking plate (14) and a lower blanking plate (15) stacked up and down, the upper blanking plate (14) is provided with an upper blanking plate mesh opening (20) running through it from top to bottom, and the lower blanking plate (15) is provided with a lower blanking plate mesh opening (24) running through it from top to bottom, the upper blanking plate mesh opening (20) and the lower blanking plate mesh opening (24) are aligned up and down, the upper blanking plate (14) is installed below the fine fiber filter (11), the upper blanking plate mesh opening (20) matches the mesh opening of the fine fiber filter (11), the lower blanking plate mesh opening (24) gradually shrinks downward, and the lower end width of the lower blanking plate mesh opening (24) is a predetermined value for fine screening.

2. The multi-fineness bamboo fiber and impurity screening device according to claim 1, characterized in that: The impurity centrifugal unit comprises an outer box (1) and an inner box (2), wherein the inner box (2) is placed in the outer box (1), a feed port (3) is provided at the top of the outer box (1), the feed port (3) passes through the outer box (1) and is communicated with the inner box (2), an impurity discharge port (6) is provided at the lower half of the outer box (1), and a drop port (7) is provided at the bottom, the side wall of the inner box (2) is made of a filter (4), a turntable (5) is provided at the bottom of the inner box (2), the turntable (5) can rotate under the drive of a motor, bamboo fibers and impurities can enter the inner box (2) from the feed port (3), the turntable (5) can rotate, and the impurities contacting the turntable (5) pass through the filter (4) due to centrifugal force and enter the outer box (1).

3. The multi-fineness bamboo fiber and impurity screening device according to claim 2, characterized in that: The turntable (5) is provided with an openable and closable drop hole (23), which is aligned with the drop opening (7). When the drop hole (23) is opened, the bamboo fibers on the turntable (5) can drop into the drop opening (7) through the drop hole (23).

4. The multi-fineness bamboo fiber and impurity screening device according to claim 3, characterized in that: The impurity discharge port (6) is connected to an air pump for generating negative pressure on the outer box (1).

5. The multi-fineness bamboo fiber and impurity screening device according to claim 4, characterized in that: The fine fiber filter (11) is connected to a vibration motor, and the vibration motor can drive the fine fiber filter (11) to vibrate.

6. The multi-fineness bamboo fiber and impurity screening device according to claim 5, characterized in that: The upper surface of the lower blanking plate (15) is inclined, and the lower blanking plate mesh opening (24) penetrates the lower blanking plate (15) up and down, and also penetrates a side surface of the lower blanking plate (15) with a lower height to form a sliding outlet (21). Bamboo fibers with a diameter greater than a predetermined value for fine screening can pass through the lower blanking plate mesh opening (24) and slide out from the sliding outlet (21).

7. The multi-fineness bamboo fiber and impurity screening device according to claim 6, characterized in that: The screening conveying unit comprises a screening conveyor belt (16) and a cover plate (17). The screening conveyor belt (16) is wound around two rotating wheels driven by a motor. The drop plate mesh opening (24) is arranged directly above the screening conveyor belt (16). The surface of the screening conveyor belt (16) is provided with a plurality of grooves (19) extending along the axial direction of the screening conveyor belt (16). The width of the grooves (19) is the same as the predetermined value for fine screening. The cover plate (17) is arranged on the upper surface of the screening conveyor belt (16). The lower end of the cover plate (17) is closely matched with the upper surface of the screening conveyor belt (16). The cover plate (17) is used to prevent bamboo fibers that are not in the grooves (19) from passing through. One end of the screening conveyor belt (16) is docked with a predetermined position for receiving bamboo fibers.

8. The multi-fineness bamboo fiber and impurity screening device according to claim 7, characterized in that: The screening and conveying unit further comprises a bottom plate (18), which is installed near the screening conveyor belt (16). The surface of the bottom plate (18) is provided with a material stripping rib (22), which can extend into the groove (19).

Images