A wood chip board sawdust adding device with a winnowing mechanism

Abstract

The application discloses a shavings board sawdust adding device with a winnowing mechanism and relates to the technical field of shavings board processing. The shavings board sawdust adding device comprises a winnowing bin provided with a feeding bin at the top, a blower is installed on the lateral outer wall of the winnowing bin, a discharging bin is fixed to the lateral outer wall of the winnowing bin away from the blower, an impurity outlet is connected to the bottom of the winnowing bin, a rubbing bin is installed on the discharging bin, and a rubbing mechanism is arranged in the rubbing bin. In the application, the shavings board sawdust in the winnowing bin is winnowed by the blower, so that the sawdust can be blown loose by the wind and discharged into the discharging bin, and the impurities (such as metal blocks and stones) in the sawdust can fall into the impurity outlet under the action of gravity, thereby realizing the separation of the sawdust and the impurities. The rubbing mechanism rubs and presses the sawdust, thereby rubbing and crushing the large pieces of sawdust and reducing the volume of the sawdust, so that the sawdust can be better pressed and formed in the subsequent pressing process.

Description

Technical Field

[0001] This invention relates to the field of particleboard processing technology, specifically to a particleboard sawdust adding device with an air separation mechanism. Background Technology

[0002] Particleboard, also known as bagasse board or chipboard, is a type of engineered wood product made from wood chips or other lignocellulosic materials bonded together with adhesives under heat and pressure. Particleboard has a relatively uniform structure and good processing performance, allowing it to be processed into large-format boards as needed. Its main characteristics include: Uniform structure: The relatively uniform structure of particleboard facilitates processing. Good processing performance: It can be processed into boards of different specifications and styles as needed. Good sound absorption and insulation properties: It has good sound absorption and insulation effects. Rough edges: The edges easily absorb moisture, so edge banding is very important. Higher density: Compared to other boards, furniture made from particleboard is heavier.

[0003] In the current particleboard processing, sawdust, as an indispensable raw material, is widely added to the pressing equipment. After a series of processes, it is finally pressed into particleboard. For example, patent publication number CN 119610320A discloses a novel waterproofing agent application device for particleboard, including: a mixing box, with a feeding pipe fixedly connected to the upper end of the mixing box; and an application mechanism. This invention also relates to a novel waterproofing agent application method for particleboard, including the following steps: S1, adding particleboard fragments to the feeding pipe, then driving the motor to rotate rapidly clockwise, the dispersing disc driving multiple dispersing grooves to rotate, and under the action of centrifugal force, the particleboard fragments are evenly dispersed in the mixing box.

[0004] The aforementioned patent describes a mechanism where particleboard fragments are flung outwards by multiple dispersion troughs and evenly dispersed in a mixing chamber. A waterproofing agent is then sprayed through a liquid inlet pipe, a first annular pipe, a second annular pipe, a first liquid outlet, and a second liquid outlet, evenly coating each particleboard fragment before mixing. However, in actual production, the quality of sawdust is often difficult to guarantee, frequently containing impurities such as stones and metal pieces. The presence of these impurities not only severely interferes with the normal operation of the pressing equipment but may also damage the equipment during pressing, potentially leading to a decline in the quality of the final particleboard product, affecting its performance and market competitiveness.

[0005] Therefore, effectively screening and removing impurities during the sawdust addition process to the pressing equipment to ensure the purity and quality of the sawdust is particularly important and crucial. This is not only an important step in ensuring the smooth operation of particleboard processing and production, but also a vital guarantee for improving product quality and market competitiveness. Summary of the Invention

[0006] The purpose of this invention is to provide a particleboard sawdust adding device with an air separation mechanism to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A particleboard sawdust adding device with an air separation mechanism, comprising: An air separator with a feeding hopper at the top, and a blower installed on one of the horizontal outer walls of the air separator; The discharge bin is fixed to the outer wall of the air classifier on the side away from the blower, and the bottom of the air classifier is connected to an impurity outlet. The kneading chamber is installed at the outlet of the discharge hopper, and the kneading chamber is equipped with a kneading mechanism.

[0008] Furthermore, the top surface of the discharge bin adjacent to the air separator is inclined downwards.

[0009] Furthermore, the kneading mechanism includes a connecting chamber connected to the lower opening of the kneading chamber. A hollow support is connected to the bottom of the connecting chamber, and a servo motor is installed on the hollow support. The motor shaft of the servo motor drives a rotating screen plate. The top of the rotating screen plate is concave, and a grid is provided on the upward-facing side. The rotating screen plate is located in the inner cavity of the kneading chamber, and the upper surface of the rotating screen plate slides in contact with the top wall of the inner cavity of the kneading chamber.

[0010] Furthermore, the top wall of the inner cavity of the kneading chamber is fixed with multiple arc-shaped protrusions, which are located in the inner cavity of the rotating screen plate.

[0011] Furthermore, multiple arc-shaped protrusions are arranged in an array along the axial direction of the kneading chamber.

[0012] Furthermore, the motor shaft of the servo motor is connected to the rotating screen plate through a floating mechanism. The floating mechanism is used to make the rotating screen plate and the motor shaft of the servo motor move horizontally relative to each other. The inner cavity of the kneading chamber is provided with a swing mechanism, which is used to make the rotating screen plate generate horizontal reciprocating motion when it rotates.

[0013] Furthermore, the floating mechanism includes a sliding block fixed to the bottom of the rotating screen plate, a connecting plate fixed to the end of the motor shaft of the servo motor, a fixing block fixed to the end face of the connecting plate, a sliding cavity for the sliding block to engage on the top surface of the fixing block, the sliding block sliding freely horizontally within the sliding cavity, a limiting rod horizontally fixedly passing through the outer wall of the fixing block, a sliding hole for the limiting rod to pass freely through the surface of the sliding block, and two elastic elements located on opposite sides of the sliding cavity, which exert elastic resisting forces on the sliding block in opposite directions.

[0014] Furthermore, the longitudinal section of the limiting rod is rectangular.

[0015] Furthermore, the swing mechanism includes a fixed ring coaxially and fixedly sleeved around the periphery of the rotating screen plate. Two rollers are rotatably connected around the periphery of the fixed ring. The two rollers are symmetrically arranged along the axial direction of the fixed ring. A shaped ring is coaxially connected to the top wall of the inner cavity of the kneading chamber. Multiple arc-shaped protrusions are fixed to the annular hole wall of the shaped ring, and an arc-shaped groove corresponding to the arc-shaped protrusions is opened in the annular hole wall of the shaped ring. The two rollers cooperate with the arc-shaped protrusions and the arc-shaped grooves.

[0016] Furthermore, the two rollers are located at both ends of the length direction of the limiting rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) In this invention, a highly efficient air separation system is designed. The powerful airflow generated by the blower performs a detailed air separation process on the particleboard sawdust entering the air separation chamber. Under the action of the wind, the sawdust is fully loosened and smoothly guided to the discharge hopper, thus completing the initial collection of sawdust. At the same time, various impurities mixed in with the sawdust, such as metal blocks and stones, cannot be blown away by the wind due to their large weight. They will fall naturally to the specially designed impurity outlet under the action of gravity, realizing the complete separation of sawdust and impurities and improving the purity of subsequent processing.

[0018] (2) This invention also incorporates an innovative kneading mechanism design. This mechanism effectively breaks down large flakes of sawdust into finer particles by applying appropriate kneading pressure. During this process, the volume of the sawdust is significantly reduced, saving storage space and allowing for more even distribution of the sawdust during subsequent pressing, resulting in better pressing and shaping. This kneading process not only improves the processing efficiency of the sawdust but also enhances the quality and stability of the final product.

[0019] (3) In addition, the present invention also cleverly adopts a design that drives the rotating screen plate to rotate using a servo motor. When the rotating screen plate rotates under the drive of the servo motor, the grid and arc-shaped convex strips on it work together to form a unique kneading effect. This design not only further kneads the sawdust, but also ensures that the sawdust is fully mixed and homogenized during the rotation process. At the same time, since the rotating screen plate also performs reciprocating linear motion on the horizontal plane during the rotation process, this composite motion greatly enhances the kneading effect, making the sawdust treatment more thorough and laying a solid foundation for subsequent processing steps.

[0020] In summary, this invention integrates several innovative designs to achieve highly efficient processing of particleboard sawdust. First, a powerful airflow generated by a blower separates the sawdust from impurities upon entering the air-separating chamber, effectively improving the purity of the sawdust. Second, a unique kneading mechanism is designed to knead the sawdust, reducing its volume and facilitating subsequent pressing and shaping, thus improving processing efficiency and product quality. Finally, a servo motor drives the rotating screen plate, and the combination of a grid and arc-shaped convex strips, along with the reciprocating linear motion of the rotating screen plate on a horizontal plane, further enhances the kneading effect, making the sawdust processing more thorough and providing strong support for subsequent processing steps. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a particleboard sawdust adding device with an air separation mechanism according to the present invention. Figure 2 for Figure 1 A diagram illustrating the positional relationship from another perspective; Figure 3 for Figure 1 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 4 This is a schematic diagram showing the positional relationship between the kneading chamber, the connecting chamber, and the servo motor after assembly in this invention; Figure 5 for Figure 4 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 6 This is a schematic diagram showing the positional relationship of the irregular ring, rotating sieve plate, and arc-shaped protrusion after assembly in this invention. Figure 7 for Figure 6 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 8 for Figure 7 Enlarged schematic diagram of the local structure at point A; Figure 9 for Figure 6 A diagram illustrating the positional relationship from another perspective.

[0022] The following are the annotations for each item in the diagram: 1. Blower; 2. Feeding bin; 3. Air separator; 4. Discharge bin; 5. Kneading bin; 6. Connecting bin; 7. Servo motor; 8. Impurity outlet; 9. Rotating screen plate; 10. Hollowed-out bracket; 11. Irregular ring; 12. Arc-shaped protrusion; 13. Fixing ring; 14. Arc-shaped protrusion; 15. Arc-shaped groove; 16. Roller; 17. Mounting bracket; 18. Connecting plate; 19. Sliding cavity; 20. Sliding block; 21. Fixing block; 22. Limiting rod; 23. Elastic element. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1-9 This invention provides a technical solution: a sawdust addition device for particleboard with an air separation mechanism, including an air separation chamber 3, a feeding chamber 2 connected to the top of the air separation chamber 3, which can feed sawdust into the air separation chamber 3, a blower 1 installed on the outer wall of one side of the air separation chamber 3, the blower 1 rotates when powered on and generates airflow into the air separation chamber 3, a discharge chamber 4 on the outer wall of the air separation chamber 3 away from the blower 1, and an impurity outlet 8 connected through the bottom of the air separation chamber 3, the airflow generated by the blower 1 blows towards the sawdust and then towards the discharge chamber 4, the top surface of the discharge chamber 4 adjacent to the air separation chamber 3 is inclined downward, so that the airflow generated by the blower 1 generates a certain degree of vortex in the inclined part of the discharge chamber 4, and the sawdust blown into the discharge chamber 4 by the blower 1 can quickly enter the outlet of the discharge chamber 4 under the drive of the vortex; The aforementioned structure utilizes the powerful airflow generated by blower 1 to perform comprehensive and multi-layered air separation treatment on the sawdust entering the air separation chamber. Under the precise action of the airflow, the sawdust is thoroughly loosened, making its structure more porous and easier to guide to the discharge hopper 4, achieving rapid and effective initial collection of the sawdust. Simultaneously, various impurities mixed in with the sawdust, such as metal blocks and pebbles, due to their significant weight, cannot resist the force of the airflow and will naturally fall to the specially designed impurity outlet under the guidance of gravity. This design not only achieves complete separation of sawdust and impurities but also significantly improves the purity of subsequent processing, providing a strong guarantee for subsequent processing steps.

[0025] The discharge hopper 4 is equipped with a kneading and pressing chamber 5 with an open lower opening. The kneading and pressing chamber 5 is equipped with a kneading and pressing mechanism, which kneads and presses the sawdust, thereby breaking down large pieces of sawdust and reducing the volume of the sawdust. This allows the sawdust to be better pressed and shaped in the subsequent pressing process.

[0026] The kneading mechanism includes a connecting chamber 6 connected to the lower opening of the kneading chamber 5. A perforated support 10, connected to the bottom of the connecting chamber 6, is located at the top of the connecting chamber 6. A servo motor 7 is mounted on the perforated support 10. A connecting plate 18 is coaxially fixed to the motor shaft of the servo motor 7. A fixing block 21 is fixed to the upper surface of the connecting plate 18. A recessed sliding cavity 19 is formed on the top surface of the fixing block 21. A sliding block 20 is fitted inside the sliding cavity 19 and can slide freely horizontally within it. A rotating screen plate 9 is fixed to the top of the sliding block 20. The top of the rotating screen plate 9 is recessed, and a grid is provided on its top surface. The rotating screen plate 9 is located inside the kneading chamber 5. The upper surface of 9 slides in contact with the top wall of the inner cavity of the kneading chamber 5. A limiting rod 22 is horizontally fixedly installed on the outer wall of the fixed block 21. A sliding hole is opened on the surface of the sliding block 20 to allow the limiting rod 22 to pass freely. Two elastic elements 23 are provided in the sliding cavity 19. The two elastic elements 23 are located on both sides of the sliding cavity 19 and generate elastic abutting forces in opposite directions on the sliding block 20. In this embodiment, the elastic element 23 can be set as a spring. The spring is wrapped around the outer edge of the limiting rod 22, and the two ends of the elastic force of each spring elastically abut against the inner wall of the sliding cavity 19 and the sliding block 20 respectively. The longitudinal section of the limiting rod 22 is rectangular, so that the limiting rod 22 will not rotate on the sliding block 20.

[0027] This mechanism effectively breaks down large flakes of sawdust into finer, more uniform particles through precise control of the kneading pressure and method. This process significantly reduces the volume of the sawdust, saving valuable storage space and allowing for more even distribution during subsequent pressing, resulting in better shaping. This kneading process not only significantly improves sawdust processing efficiency but also greatly enhances the quality and stability of the final product, making our products more competitive in the market.

[0028] A fixed ring 13 is coaxially and fixedly sleeved around the periphery of the rotating screen plate 9. Two rollers 16 are rotatably connected around the periphery of the fixed ring 13. Specifically, two mounting brackets 17 are fixedly connected around the periphery of the fixed ring 13. The two rollers 16 are rotatably connected to the two mounting brackets 17 respectively. The two rollers 16 are symmetrically arranged along the axial direction of the fixed ring 13. A shaped ring 11 is coaxially connected to the top wall of the inner cavity of the kneading chamber 5. Multiple arc-shaped protrusions 14 are fixedly connected to the annular hole wall of the shaped ring 11. The annular hole wall of the shaped ring 11 is provided with arc-shaped grooves 15 corresponding to the arc-shaped protrusions 14. The two rollers 16 are used in conjunction with the arc-shaped protrusions 14 and the arc-shaped grooves 15. The two rollers 16 are located at both ends of the length direction of the limiting rod 22. Multiple arc-shaped protrusions 12 are fixedly connected to the top wall of the inner cavity of the kneading chamber 5. The arc-shaped protrusions 12 are located in the inner cavity of the rotating screen plate 9. In addition, the multiple arc-shaped protrusions 12 are arranged in an array along the axial direction of the kneading chamber 5. In this structure, a servo motor 7 drives a rotating screen plate 9 to rotate. As the screen plate 9 rotates, the grid and arc-shaped convex strips 12 work together to knead and compress the sawdust. Furthermore, the reciprocating linear motion of the screen plate 9 on a horizontal plane during rotation enhances the kneading and compressing effect on the sawdust. This design not only further shreds the sawdust but also ensures thorough mixing and homogenization during rotation, thereby improving the overall quality of the sawdust. Simultaneously, the reciprocating linear motion of the screen plate 9 on a horizontal plane during rotation greatly enhances the kneading and compressing effect, resulting in more thorough and uniform sawdust processing. This design not only adds more technological highlights to our invention but also lays a more solid foundation for subsequent processing steps. Working principle of the invention: Sawdust is fed into the feeding hopper 2. Under the action of gravity, the sawdust will fall from the feeding hopper 2 into the air separation hopper 3. The blower 1 works to generate airflow. Under the action of the airflow, the sawdust will be blown towards the discharge hopper 4. Larger metal blocks, stones and other impurities in the sawdust will fall into the impurity outlet 8 and be collected by the external collection device. The sawdust blown into the discharge bin 4 will enter the rotating screen plate 9 through the outlet of the discharge bin 4. The servo motor 7 will start and drive the rotating screen plate 9 to rotate. When the rotating screen plate 9 rotates, the roller 16 will rotate in the irregular ring 11, and the two rollers 16 will roll in contact with the inner wall of the arc-shaped protrusion 14 and the arc-shaped groove 15 respectively. That is, when one roller 16 rolls in contact with the arc-shaped protrusion 14, the other roller 16 will roll in the inner wall of the arc-shaped groove 15, thereby causing the two elastic elements 23 to be in a compressed state and an elongated state respectively (the two elastic elements 23 are initially in a compressed state of a certain amplitude), so that the elastic elements 23 accumulate elastic potential energy. The sliding block 20 moves horizontally in the sliding cavity 19, thereby causing the rotating screen plate 9 to make a reciprocating linear motion on the horizontal plane while rotating. This causes the rotating screen plate 9 to drive the sawdust falling into its concave part to move. When the rotating screen plate 9 rotates, the sawdust will rotate with the rotating screen plate 9. During the movement, the sawdust will be squeezed by the arc-shaped protrusions 12. Under the action of the squeezing force, large pieces of sawdust will be crushed and fall out from the grid of the rotating screen plate 9, and then fall into the external pressing equipment through the lower opening of the connecting chamber 6.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A particle board sawdust adding device having a winnowing mechanism, characterized by, include: An air separation chamber (3) with a feeding bin (2) at the top is provided, and a blower (1) is installed on one side of the outer wall of the air separation chamber (3). The discharge bin (4) is fixed to the outer wall of the air separator (3) on the side away from the blower (1), and the bottom of the air separator (3) is connected to the impurity outlet (8). The kneading chamber (5) is installed at the outlet of the discharge hopper (4), and the kneading chamber (5) is equipped with a kneading mechanism; The kneading mechanism includes a connecting chamber (6) connected to the lower opening of the kneading chamber (5). A hollow support (10) is connected to the bottom of the connecting chamber (6). A servo motor (7) is installed on the hollow support (10). The motor shaft of the servo motor (7) drives a rotating screen plate (9). The top of the rotating screen plate (9) is concave, and a grid is provided on the upward-facing side. The rotating screen plate (9) is located in the inner cavity of the kneading chamber (5), and the upper surface of the rotating screen plate (9) slides in contact with the top wall of the inner cavity of the kneading chamber (5). The inner wall of the kneading chamber (5) is fixed with a plurality of arc-shaped protrusions (12), which are located in the inner cavity of the rotating sieve plate (9); Multiple arc-shaped protrusions (12) are arranged in an array along the axial direction of the kneading chamber (5); The motor shaft of the servo motor (7) is connected to the rotating screen plate (9) through a floating mechanism. The floating mechanism is used to make the rotating screen plate (9) and the motor shaft of the servo motor (7) move horizontally relative to each other. The inner cavity of the kneading chamber (5) is provided with a swing mechanism. The swing mechanism is used to make the rotating screen plate (9) generate horizontal reciprocating motion when it rotates. The floating mechanism includes a sliding block (20) fixed to the bottom of the rotating screen plate (9), a connecting plate (18) fixed to the end of the motor shaft of the servo motor (7), a fixing block (21) fixed to the end face of the connecting plate (18), a sliding cavity (19) for the sliding block (20) to engage on the top surface of the fixing block (21), the sliding block (20) slides freely horizontally in the sliding cavity (19), a limiting rod (22) is fixedly and horizontally inserted on the outer wall of the fixing block (21), a sliding hole for the limiting rod (22) to pass freely on the surface of the sliding block (20), and two elastic elements (23) are provided in the sliding cavity (19). The two elastic elements (23) are located on both sides of the sliding cavity (19) and generate elastic abutment forces in opposite directions on the sliding block (20).

2. A wood chip board sawdust adding device having a winnowing mechanism according to claim 1, characterized in that, The top surface of the discharge bin (4) adjacent to the air separator (3) is inclined downward.

3. A sawdust adding device for a particle board with a wind selection mechanism according to claim 1, characterized in that, The longitudinal section of the limiting rod (22) is rectangular.

4. A particleboard sawdust adding device with an air-separating mechanism according to claim 1, characterized in that, The swing mechanism includes a fixed ring (13) coaxially fixedly sleeved around the periphery of the rotating screen plate (9). Two rollers (16) are rotatably connected around the periphery of the fixed ring (13). The two rollers (16) are symmetrically arranged along the axial direction of the fixed ring (13). A shaped ring (11) is coaxially connected to the top wall of the inner cavity of the kneading chamber (5). Multiple arc-shaped protrusions (14) are fixed to the annular hole wall of the shaped ring (11). An arc-shaped groove (15) corresponding to the arc-shaped protrusion (14) is opened in the annular hole wall of the shaped ring (11). The two rollers (16) are used in conjunction with the arc-shaped protrusion (14) and the arc-shaped groove (15).

5. A particleboard sawdust adding device with an air-separating mechanism according to claim 4, characterized in that, The two rollers (16) are located at both ends of the length direction of the limiting rod (22).

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