A high-precision board blank laying device for chipboard
By combining screening tanks, rollers, and blowing devices, high-precision plywood slab laying is achieved, solving the problem of poor plywood slab layering in existing technologies, simplifying equipment structure, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGXI FORESTRY RES INST
- Filing Date
- 2025-07-23
- Publication Date
- 2026-05-19
AI Technical Summary
The existing particleboard blanks have poor delamination effect, resulting in complex equipment structures and high costs, which limits their application scope.
The process employs a screening tank and rollers for initial shaving separation, and a blowing device for further separation of flake and fine shavings. The process is achieved through the transport of shavings by different conveyor belts, resulting in a multi-layered structure with flake shavings distributed inside and fine shavings distributed outside.
It achieves high-precision laying of particleboard blanks, simplifies equipment structure, reduces costs, and improves the finished product performance of blanks.
Smart Images
Figure CN120572602B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of engineered wood products technology, and in particular to a high-precision particleboard blank laying device. Background Technology
[0002] Particleboard is one of the most commonly used engineered wood products, widely used in furniture manufacturing, interior decoration, and other fields. During the production of particleboard, the quality of the board fabrication directly affects the performance of the finished product.
[0003] In existing technologies, particleboard blanks are spread into blanks of a certain size, quantity, and uniformity using a particleboard blank laying device. The particleboard blanks vary in size, some being whole flakes, some being finely broken, and some being in powder form. In order to make the composite blank structure flat and facilitate subsequent surface decoration such as veneer, existing technologies usually design the particleboard blanks to be multi-layered, with flake-shaped particleboard blanks distributed in the core layer and finely broken particleboard blanks distributed in the surface layer. However, existing particleboard sorting and laying equipment has a complex structure and high cost, which limits its application scope. Summary of the Invention
[0004] In view of this, the present application provides a high-precision particleboard blank laying device to solve the problem of poor delamination effect of particleboard blanks in the prior art.
[0005] The high-precision particleboard blank laying device provided in this application embodiment first utilizes the cooperation of a screening trough and a roller to discharge flake-shaped wood shavings from the screening trough, allowing fine wood shavings to pass through the gaps, achieving initial separation of wood shavings. Secondly, a blowing device further separates the wood shavings, ultimately achieving the transfer of fine wood shavings on a first conveyor belt and flake-shaped wood shavings on a second conveyor belt. In this way, the particleboard blank to be assembled can first have a lower layer of fine wood shavings laid on the first conveyor belt, then a layer of flake-shaped wood shavings laid on the second conveyor belt, and finally an upper layer of fine wood shavings laid on the first conveyor belt, achieving the assembly of a multi-layered particleboard blank with flake-shaped wood shavings distributed inside and fine wood shavings distributed outside.
[0006] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0007] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0008] Figure 1 This is a schematic diagram of the Y-direction projection of the high-precision particleboard blank laying device provided in the embodiments of this application;
[0009] Figure 2 This is a schematic diagram of the high-precision particleboard blank laying device provided in the embodiments of this application;
[0010] Figure 3 This is a schematic diagram of the screening groove structure provided in an embodiment of this application;
[0011] Figure 4 A schematic diagram of the principle of the high-precision particleboard blank laying device provided in this application embodiment;
[0012] Figure 5 This is a schematic diagram of the cross-sectional structure of a high-precision particleboard blank provided in an embodiment of this application;
[0013] Figure 6 This is a schematic diagram of the leveling mechanism structure provided in the embodiments of this application;
[0014] Figure 7 This is a schematic diagram of the roller structure provided in an embodiment of this application.
[0015] The attached figures are labeled as follows:
[0016] 1. Screw conveyor device;
[0017] 2. Hopper;
[0018] 3. Feed trough; 31. Screening trough; 311. Gap;
[0019] 4. Roller; 41. Roller body; 42. Spring;
[0020] 5. First guide plate;
[0021] 6. Blowering device;
[0022] 7. Second guide plate; 71. First guide surface; 72. Second guide surface;
[0023] 8. First conveyor belt;
[0024] 9. First scraper assembly;
[0025] 10. Second conveyor belt;
[0026] 11. Second scraper assembly;
[0027] 12. Third conveyor belt;
[0028] 13. Leveling mechanism; 131. Leveling machine frame;
[0029] 132. Compression bar;
[0030] 133. Transmission components;
[0031] 134. Electric motor;
[0032] 14. Vibrating feeder;
[0033] 15. Drive motor;
[0034] 200. Finely shredded wood shavings at the bottom;
[0035] 300. Flaky wood shavings layer;
[0036] 400. Finely shredded wood shavings on top. Detailed Implementation
[0037] To make the technical solution and beneficial effects of the present invention more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.
[0038] In the description of this invention, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this invention and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limiting this invention.
[0039] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.
[0040] In this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0041] In this invention, unless otherwise explicitly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature above second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.
[0042] The X, Y, or Z directions mentioned in this embodiment are based on the Cartesian coordinate system, meaning that X, Y, and Z are perpendicular to each other. The X, Y, or Z directions include both positive and negative directions. If the description does not explicitly state whether it is positive or negative, it should be understood that it can be either positive or negative.
[0043] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.
[0044] like Figure 5 As shown, this embodiment pre-synthesizes a particleboard blank with flake-like shavings distributed in the core layer and fine shavings distributed in the surface layer. The particleboard blank is divided from bottom to top into a lower layer of fine shavings 200, a layer of flake-like shavings 300, and an upper layer of fine shavings 400. The lower layer 200 and the upper layer 400 are both formed by laying down fine shavings, while the layer of flake-like shavings 300 is located at the innermost layer of the particleboard blank and is formed by laying down flake-like shavings. The aforementioned flake-like shavings and fine shavings refer to the relatively intact portion and the relatively fine portion of the raw shavings. In this embodiment, a screening trough 31 and a blowing device 6 are used to screen the shavings during their fall. A portion of the screened shavings is considered the fine shavings in this embodiment, and the other portion is considered the flake-like shavings. It is understandable that during the actual screening process of wood shavings, there will inevitably be occasional situations where flaky wood shavings fall into the location of fine wood shavings, or vice versa. Therefore, in this embodiment, the types of wood shavings are not classified according to their actual weight, area, or volume. Instead, the classification standard for distinguishing the types of wood shavings in this embodiment is the location where the wood shavings fall after screening by the screening tank 31 and the blowing device 6.
[0045] like Figure 1 As shown, this embodiment provides a high-precision particleboard blank laying device, such as... Figure 1 , Figure 2As shown, it includes: a feed trough 3, a roller 4, a blower 6, a first conveyor belt 8, and a second conveyor belt 10.
[0046] The feed trough 3 is used to receive the flaky or fine wood shavings discharged from the hopper 2; the feed trough 3 includes a screening trough 31, the bottom plate of which is arc-shaped, such as... Figure 3 As shown, the bottom plate of the screening tank 31 has several gaps 311 or openings; the gaps 311 or openings allow fine wood shavings to pass through.
[0047] The roller 4 is installed inside the screening tank 31 and can rotate under the drive of the drive motor 15. The wood shavings located in the feed trough 3 can enter between the roller 4 and the bottom plate of the screening tank 31, and can move along the bottom plate of the screening tank 31 under the action of the rotation of the roller 4, and be discharged from the discharge end of the screening tank 31. Under the action of the roller 4, the flaky wood shavings obviously pass through the screening tank 31 more easily, while the fine wood shavings are more likely to leak from the gaps 311 or openings and fall downwards, realizing the initial screening of wood shavings.
[0048] The blowing device 6 is used for forward blowing along the X direction and is located on one side of the discharge end of the screening tank 31. For example... Figure 4 As shown, under the action of the air blowing device 6, the wood shavings discharged from the discharge end of the screening tank 31 are subjected to a positive force in the X direction. The relatively fine wood shavings are more easily affected by this force and therefore tend to fall onto the first conveyor belt 8, while the relatively flaky wood shavings are less affected and tend to fall onto the second conveyor belt 10. This achieves a second screening of the wood shavings.
[0049] The first conveyor belt 8 is located at least partially below the screening tank 31 along the Z direction, for receiving fine wood shavings passing through the slit 311 or opening, as well as fine wood shavings discharged from the screening tank 31 and subjected to the force of the blowing device 6.
[0050] The second conveyor belt 10 is used to receive the flaky wood chips discharged from the screening tank 31; the projection of the second conveyor belt 10 along the Z direction is at least partially located on the opposite side of the projection of the first conveyor belt 8 along the Z direction in the X direction, so as to be staggered from the first conveyor belt 8, which facilitates the collection of the flaky wood chips discharged from the screening tank 31.
[0051] The high-precision particleboard blank laying device provided in this application embodiment first utilizes the cooperation of the screening trough 31 and the roller 4 to discharge flake-shaped wood shavings from the screening trough 31, allowing fine wood shavings to pass through the gap 311, thus achieving initial separation of wood shavings. Secondly, the blowing device 6 further separates the wood shavings, ultimately achieving the transmission of fine wood shavings on the first conveyor belt 8 and flake-shaped wood shavings on the second conveyor belt 10. In this way, the particleboard to be assembled first has a lower layer 200 of fine wood shavings laid on the first conveyor belt 8, then a layer 300 of flake-shaped wood shavings laid on the second conveyor belt 10, and finally an upper layer 400 of fine wood shavings laid on the first conveyor belt 8, achieving the synthesis of a multi-layered particleboard blank with flake-shaped wood shavings distributed inside and fine wood shavings distributed outside.
[0052] In an alternative embodiment, such as Figure 1 , Figure 2 As shown, the high-precision particleboard blank laying device of this embodiment also includes a first guide plate 5. The first guide plate 5 has a first side connected to the discharge end of the screening trough 31, and a second side extending in the opposite direction of the X direction and downward in the Z direction, with the second side being the opposite side of the first side. In this embodiment, by extending the first guide plate 5, the wood chips discharged from the discharge end of the screening trough 31 slide down along it and are transferred to a position farther away from the screening trough 31 in the X direction, so as to separate the wood chips into two piles.
[0053] In an alternative embodiment, such as Figure 1 , Figure 2 , Figure 4 As shown, the high-precision particleboard blank laying device also includes a second guide plate 7; along the Z direction, the upper end of the second guide plate 7 is located below the second side of the first guide plate 5. The second guide plate 7 includes a first guide surface 71 and a second guide surface 72; the first guide surface 71 extends along the X and Z directions to guide the particleboard shavings above the Z direction to the first conveyor belt 8; the second guide surface 72 extends along the Z direction to guide the particleboard shavings on the opposite side of the X direction to the second conveyor belt 10. In this embodiment, the function of the second guide plate 7 is to better disperse the particleboard shavings after being acted upon by the air blowing device 6, so that the fine particleboard shavings and flake particleboard are better guided onto the first conveyor belt 8 and the second conveyor belt 10, respectively.
[0054] In an alternative embodiment, such as Figure 1 , Figure 2As shown, the high-precision particleboard blank laying device also includes a first scraper assembly 9 and a second scraper assembly 11. The first scraper assembly 9 is used to level the wood shavings conveyed on the first conveyor belt 8, and the second scraper assembly 11 is used to level the wood shavings conveyed on the second conveyor belt 10. In this embodiment, by setting the first scraper assembly 9 and the second scraper assembly 11, the piles of wood shavings conveyed on the first conveyor belt 8 and the second conveyor belt 10 can be spread as flatly as possible on the surface of the conveyor belts. Optionally, the first scraper assembly 9 and the second scraper assembly 11 include a scraper body and a lifting mechanism. The scraper body is plate-shaped and arranged parallel to the surface of the conveyor belt. The height difference between the scraper body and the surface of the conveyor belt is the thickness of the wood shaving layer. The lifting mechanism is used to drive the scraper body to rise and fall, so as to change the height difference, that is, the thickness of the wood shaving layer is controllable.
[0055] In an alternative embodiment, such as Figure 1 , Figure 2 As shown, the high-precision particleboard blank laying device also includes a third conveyor belt 12, which is located below the first conveyor belt 8 and the second conveyor belt 10 along the Z direction. The third conveyor belt 12 is used for forward or reverse transmission along the X direction, so that the wood shavings transmitted by the first conveyor belt 8 and the second conveyor belt 10 fall onto its surface. In this embodiment, the third conveyor belt 12 is arranged below the first conveyor belt 8 and the second conveyor belt 10 along the Z direction, which can conveniently receive the wood shavings scattered by the first conveyor belt 8 and the second conveyor belt 10. Since two layers of fine wood shavings need to be laid, the third conveyor belt 12 is designed to be able to transmit in the forward or reverse direction along the X direction and return after passing through the first conveyor belt 8 for a second layer of fine wood shavings laying.
[0056] Understandable, such as Figure 2 As shown, to prevent leakage of wood shavings in the Y direction, baffles should be provided on both sides of the high-precision particleboard blank laying device in this embodiment. For example, baffles should be provided on both sides of the first guide plate 5, the second guide plate 7, the first conveyor belt 8, the second conveyor belt 10, and the third conveyor belt 12 in the Y direction. To ensure controllable transmission of the first conveyor belt 8, the second conveyor belt 10, and the third conveyor belt 12, the drive devices used to start them can be individually controlled to switch on / off, rotate forward or reverse.
[0057] In an alternative embodiment, such as Figure 1 , Figure 2 As shown, the high-precision particleboard blank laying device also includes a leveling mechanism 13, which is used to level the wood shavings piled up on the third conveyor belt 12. In this embodiment, the leveling mechanism 13 can perform a leveling operation on the entire particleboard blank after the three layers of wood shavings are laid, so as to improve the flatness of the final particleboard blank.
[0058] In an alternative embodiment, such as Figure 6As shown, the leveling mechanism 13 includes: a leveling frame 131, a pressure bar 132, a transmission component 133, and a motor 134. The top of the leveling frame 131 is located above the third conveyor belt 12 along the Z direction. The pressure bar 132 is parallel to the surface of the third conveyor belt 12 and is positioned above the third conveyor belt 12 along the Z direction. The lowest point of the pressure bar 132 along the Z direction is spaced at a preset distance from the surface of the third conveyor belt 12. The transmission component 133 is rotatably mounted on the leveling frame 131 and connected to the pressure bar 132. The motor 134 is fixed on the top of the leveling frame 131, and the drive end of the motor 134 is connected to the transmission component 133. When the motor 134 is started, it can drive the pressure bar 132 to rotate in a plane parallel to the surface of the third conveyor belt 12. In this embodiment, by setting a rotatable pressure bar 132, the three layers of wood shavings transported by the third conveyor belt 12 are gradually flattened under the rotation and compression of the pressure bar 132. The rotating pressure bar 132 compresses the surface of the wood shavings at more angles, resulting in a better flattening effect.
[0059] In an alternative embodiment, such as Figure 6 As shown, the lower surface of the pressure bar 132 along the Z direction is an arc surface. In this embodiment, the arc surface of the lower surface of the pressure bar 132 allows the pressure to gradually increase when extruding the wood shavings layer, which is beneficial for gradually compacting the wood shavings layer.
[0060] In an alternative embodiment, such as Figure 7 As shown, the roller 4 includes a cylindrical roller body 41 and spring sheets 42 uniformly fixed on the surface of the roller body 41. The spring sheets 42 can apply elastic force to the wood shavings on the bottom plate of the screening tank 31 to make them adhere to the surface of the bottom plate. In this embodiment, the elastic force of the spring sheets 42 can promote the entry of fine wood shavings into the gaps 311 or openings, thereby improving the effect of preliminary screening.
[0061] In an optional embodiment, a screw conveyor 1 is used to transport wood shavings. The screw conveyor 1 is connected to a hopper 2, which discharges the wood shavings into the hopper 2. The lower end of the hopper 2 is constricted and aligned with the feed trough 3 to facilitate better discharge of the wood shavings into the feed trough 3. A vibrating feeder 14 is connected to the feed trough 3. When the vibrating feeder 14 is activated, it drives the feed trough 3 to vibrate, causing the wood shavings within to move in the opposite direction along the X direction. A drive motor 15 is connected to a roller 4, which causes the lower surface of the roller 4 to move approximately in the opposite direction along the X direction, thereby driving the wood shavings to move in the opposite direction along the bottom plate of the screening trough 31. The first conveyor belt 8, the second conveyor belt 10, and the third conveyor belt 12 can all be started or stopped independently. The third conveyor belt 12 can also be selected to transport in the forward or reverse direction along the X direction.
[0062] This embodiment provides a method for high-precision particleboard blank laying, using the aforementioned high-precision particleboard blank laying device, and includes the following steps:
[0063] S1, start the drive motor 15, and discharge some of the wood shavings from the discharge end through the roller 4, and discharge some of the wood shavings from the gap 311 or the opening onto the first conveyor belt 8; start the blowing device 6, and blow the wood shavings discharged from the discharge end in the positive X direction, so that the fine wood shavings fall onto the first conveyor belt 8, and the flake wood shavings fall onto the second conveyor belt 10.
[0064] S2, the third conveyor belt 12 is transported in the reverse direction of the X direction, the first conveyor belt 8 is started, the fine wood shavings on the first conveyor belt 8 are spread on its surface until a fine wood shavings lower layer 200 is formed on its surface, and the first conveyor belt 8 is stopped.
[0065] S3, the third conveyor belt 12, on which the fine wood shavings lower layer 200 is laid, is transported in the reverse direction of the X direction. The second conveyor belt 10 is started, and the flake wood shavings on the second conveyor belt 10 are laid on the fine wood shavings lower layer 200 until a flake wood layer 300 is formed on the fine wood shavings lower layer 200. Then the second conveyor belt 10 is stopped.
[0066] S4, the third conveyor belt 12, on which the flake shavings layer 300 is laid, is transported in the forward direction of the X direction. The first conveyor belt 8 is started, and the fine shavings on the first conveyor belt 8 are laid on the flake shavings layer 300 until a fine shavings upper layer 400 is formed on the flake shavings layer 300.
[0067] S5, using leveling mechanism 13 to level the laid fine wood shavings upper layer 400.
[0068] In an optional embodiment, a vibrating feeder 14 drives the feed trough 3 to vibrate, and in step S1, the drive motor 15 starts and stops periodically. This driving method utilizes the vibration of the feed trough 3 to make it easier for wood shavings to be discharged from the gaps 311 or openings. During the period when the drive motor 15 is stopped, some of the fine wood shavings located in the screening trough 31 are vibrated and discharged from the gaps 311 or openings to the first conveyor belt 8. This driving method improves the effect of preliminary screening.
[0069] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.
Claims
1. A high-precision particleboard slab laying device, characterized in that, include: The feeding trough (3) is used to receive the flaky wood shavings or fine wood shavings discharged from the hopper (2); the feeding trough (3) includes a screening trough (31), the bottom plate of the screening trough (31) is arc-shaped, and the bottom plate of the screening trough (31) is provided with a plurality of slits (311) or openings; the slits (311) or openings allow the fine wood shavings to pass through; A roller (4) is installed inside the screening tank (31). The roller (4) can rotate under the drive of the drive motor (15). The wood shavings located in the feed trough (3) can enter between the roller (4) and the bottom plate of the screening tank (31), and can move along the bottom plate of the screening tank (31) under the rotation of the roller (4) and be discharged from the discharge end of the screening tank (31). A blowing device (6) is used for positive blowing in the X direction and is located on one side of the discharge end of the screening tank (31); A first conveyor belt (8), at least partially located below the screening trough (31) in the Z direction, is used to receive the fine shavings passing through the slit (311) or opening, as well as the fine shavings discharged from the screening trough (31) and subjected to the force of the blowing device (6). The second conveyor belt (10) is used to receive the shavings discharged from the screening tank (31); the projection of the second conveyor belt (10) along the Z direction is at least partially located on the side opposite to the projection of the first conveyor belt (8) along the Z direction in the X direction.
2. The high-precision particleboard blank laying device according to claim 1, characterized in that, The high-precision particleboard blank laying device also includes a first guide plate (5), the first guide plate (5) is connected to the discharge end of the screening trough (31) on the first side, and extends in the opposite direction of the X direction and downward in the Z direction on the second side, which is the opposite side of the first side.
3. The high-precision particleboard blank laying device according to claim 2, characterized in that, The high-precision particleboard blank laying device also includes a second guide plate (7); along the Z direction, the upper end of the second guide plate (7) is located below the second side of the first guide plate (5); The second guide plate (7) includes a first guide surface (71) and a second guide surface (72); the first guide surface (71) extends along the X and Z directions to guide the wood shavings above the Z direction to the first conveyor belt (8); the second guide surface (72) extends along the Z direction to guide the wood shavings on the opposite side of the X direction to the second conveyor belt (10).
4. The high-precision particleboard blank laying device according to claim 1, characterized in that, The high-precision particleboard blank laying device also includes a first scraper assembly (9) and a second scraper assembly (11). The first scraper assembly (9) is used to level the wood chips conveyed on the first conveyor belt (8), and the second scraper assembly (11) is used to level the wood chips conveyed on the second conveyor belt (10).
5. The high-precision particleboard blank laying device according to claim 1, characterized in that, The high-precision particleboard blank laying device also includes a third conveyor belt (12), which is located below the first conveyor belt (8) and the second conveyor belt (10) along the Z direction; the third conveyor belt (12) is used for forward or reverse transmission along the X direction, so that the wood chips transmitted by the first conveyor belt (8) and the second conveyor belt (10) fall onto its surface.
6. The high-precision particleboard blank laying device according to claim 5, characterized in that, The high-precision particleboard blank laying device also includes a leveling mechanism (13), which is used to level the particleboard piled up on the third conveyor belt (12).
7. The high-precision particleboard blank laying device according to claim 6, characterized in that, The leveling mechanism (13) includes: A leveling frame (131), the top of which is located above the third conveyor belt (12) along the Z direction; A pressure bar (132) is disposed parallel to the surface of the third conveyor belt (12) above the third conveyor belt (12) along the Z direction, and the lowest point of the pressure bar (132) along the Z direction is spaced at a predetermined distance from the surface of the third conveyor belt (12). The transmission component (133) is rotatably mounted on the leveling frame (131) and connected to the pressure rod (132); The motor (134) is fixed on the top of the leveling frame (131). The drive end of the motor (134) is connected to the transmission component (133). When the motor (134) is started, it can drive the pressure rod (132) to rotate in a plane parallel to the surface of the third conveyor belt (12).
8. The high-precision particleboard blank laying device according to claim 7, characterized in that, The lower surface of the pressure bar (132) along the Z direction is an arc surface.
9. The high-precision particleboard blank laying device according to any one of claims 1-8, characterized in that, The roller (4) includes a cylindrical roller body (41) and spring pieces (42) uniformly fixed on the surface of the roller body (41). The spring pieces (42) can apply elastic force to the shavings on the bottom plate of the screening tank (31) so that they fit against the surface of the bottom plate.
10. A method for high-precision particleboard slab laying, characterized in that, The high-precision particleboard blank laying device according to any one of claims 1-9 includes the following steps: S1, start the drive motor (15), and discharge some of the shavings in the feed trough (3) from the discharge end through the roller (4), and discharge some of the shavings from the gap (311) or the opening onto the first conveyor belt (8); start the blower (6), and blow some of the shavings discharged from the discharge end in the positive X direction, so that the fine shavings fall onto the first conveyor belt (8), and the flake shavings fall onto the second conveyor belt (10); S2, the third conveyor belt (12) is transported in the reverse direction of the X direction, the first conveyor belt (8) is started, and the fine wood shavings on the first conveyor belt (8) are laid on the third conveyor belt (12) until a layer of fine wood shavings (200) is formed on the third conveyor belt (12), and the first conveyor belt (8) is stopped. S3, the third conveyor belt (12) on which the fine wood shavings lower layer (200) is laid is transported in the reverse direction along the X direction, the second conveyor belt (10) is started, the flake wood shavings on the second conveyor belt (10) are laid on the fine wood shavings lower layer (200) until a flake wood shavings layer (300) is formed on the fine wood shavings lower layer (200), and the second conveyor belt (10) is stopped; S4, the third conveyor belt (12) on which the sheet-like shavings layer (300) is laid is transported in the forward direction of the X direction, the first conveyor belt (8) is started, and the fine shavings on the first conveyor belt (8) are laid on the sheet-like shavings layer (300) until a fine shavings upper layer (400) is formed on the sheet-like shavings layer (300). S5, the fine wood shavings upper layer (400) is leveled using a leveling mechanism (13).