Leveling device and system for manufacturing oriented structure shaving board

Abstract

The utility model provides a leveling device and system for manufacturing a shaving board with an oriented structure, the leveling device is arranged at the front end of a pre-pressing machine, is suitable for leveling an assembled board blank on a leveling platform before the assembled board blank enters the pre-pressing machine in the moving direction, and comprises two support frames, a plurality of guide rails and a plurality of guide rails, the two guide rails are oppositely arranged on the two sides of the width direction, perpendicular to the moving direction, of the leveling platform; the shell is connected between the two supporting frames; and the pressing plate extends in the width direction and is arranged on the lower portion of the shell, the lower portion of the pressing plate makes contact with the upper surface of the plate blank in the moving process of the plate blank, and the pressing plate is suitable for pressing wood shavings higher than the upper surface of the plate blank in the moving process of the plate blank.

Description

Technical Field

[0001] The utility model relates to the technical field of production and processing of oriented structural particle boards, and more specifically, to a leveling device and a system for making oriented structural particle boards. Background Art

[0002] Oriented Strand Board (OSB) is a man-made board made from wood shavings (usually 50 mm-80 mm long, 5 mm-20 mm wide, and 0.45 mm-0.6 mm thick) as the main raw material, through processes such as drying, gluing, directional paving, hot pressing, and veneer.

[0003] The surface layer of the oriented strand board uses large shavings in thin strips, and the core layer uses fine shavings. The surface shavings are arranged vertically, and the core shavings are arranged horizontally. This criss-cross arrangement reorganizes the wood grain structure, eliminates the influence of the internal stress of the wood on processing, and makes it extraordinary easy to process and moisture-proof. Since the interior of the OSB board is a directional structure, there are no joints, no gaps, cracks, good overall uniformity, and high internal bonding strength. Therefore, both the center and the edge have super strong nail holding ability that ordinary boards cannot match, making OSB boards widely used in furniture manufacturing, decoration, construction, etc.

[0004] However, during the processing of OSB boards, due to the large surface particles in the slab after directional paving, some particles may be lifted up or even stand upright, higher than the upper surface of the slab. As a result, during the subsequent pre-pressing or hot pressing, the upright large particles may be folded, resulting in uneven large particles on the surface of the board after pre-pressing or hot pressing, affecting the quality of the OSB board. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides a leveling device and system for making oriented structural strand board. The leveling device can remove large particles on the surface of the slab after directional paving that are higher than the upper surface of the slab, thereby improving the quality of the OSB board.

[0006] One aspect of the embodiment of the utility model provides a leveling device for making oriented strand board, the leveling device is arranged at the front end of the pre-pressing machine, and is suitable for leveling the assembled slab on the leveling platform before entering the pre-pressing machine in the moving direction, and the leveling device includes two support frames, a shell and a pressing plate. The two support frames are arranged oppositely on both sides of the width direction of the leveling platform perpendicular to the moving direction, the shell is connected between the two support frames, the pressing plate extends along the width direction and is arranged at the lower part of the shell, the lower part of the pressing plate contacts the upper surface of the slab during the movement of the slab, and the pressing plate is suitable for pressing the shavings that are higher than the upper surface of the slab during the movement of the slab.

[0007] According to an embodiment of the utility model, the housing includes two mounting parts, which are respectively mounted between the two supporting frames, the mounting parts extend along the width direction of the slab and are arranged above the slab, and the upper and lower parts of the two mounting parts respectively form an upper opening and a lower opening connected to the upper opening, wherein the pressing plate is mounted on the lower part of the mounting part located upstream along the moving direction of the slab. The leveling device also includes a scraping assembly, which is rotatably mounted on the two supporting frames and is located between the two mounting parts and downstream of the pressing plate along the moving direction of the slab, and is suitable for driving the wood chips that bounce up after being pressed by the pressing plate away from the slab.

[0008] According to an embodiment of the utility model, the scraping assembly includes a scraping plate and a cleaning roller. The scraping plate is mounted on the lower part of the mounting portion located downstream along the moving direction of the slab, and the cross section of the scraping plate is configured to be arc-shaped. The cleaning roller is rotatably arranged between the two support frames and located near the lower opening, and is suitable for cooperating with the scraping plate to drive away the shavings above the upper surface of the slab.

[0009] According to an embodiment of the utility model, the above-mentioned leveling assembly also includes a negative pressure unit, which is connected to the above-mentioned upper opening and is suitable for forming negative pressure on the upper part of the above-mentioned cleaning roller to discharge the shavings driven away by the above-mentioned cleaning roller.

[0010] According to an embodiment of the utility model, the cleaning roller comprises a roller body and a cleaning unit. The roller body is rotatably arranged between the two supporting frames, and the cleaning unit is arranged on the outer wall of the roller body. The distance between the cleaning unit and the lower end of the shoveling plate is smaller than the size of the shavings, so that the shavings rotate to the upper part of the cleaning roller following the cleaning unit.

[0011] According to an embodiment of the utility model, the above-mentioned leveling assembly further comprises a mounting frame and a driving motor. The mounting frame is mounted on one of the two supporting frames, and the driving motor is mounted on the above-mentioned mounting frame and is suitable for driving the above-mentioned cleaning roller to rotate.

[0012] According to an embodiment of the utility model, at the lowermost portion of the cleaning roller, the rotation direction of the cleaning roller is opposite to the moving direction of the slab.

[0013] According to an embodiment of the present invention, the lower surface of the pressing plate is in elastic contact with the upper surface of the slab.

[0014] According to an embodiment of the utility model, the cross section of the pressing plate is configured to be arc-shaped.

[0015] Another aspect of the embodiment of the utility model provides a system for making oriented strand board, the system comprising a laying machine, any of the above-mentioned leveling devices, a pre-pressing machine and a hot press. The laying machine is suitable for directional laying of the glued strands into a slab, wherein the size of the strands located on the surface layer of the slab is larger than the size of the strands located on the core layer; any of the above-mentioned leveling devices is suitable for removing the strands on the surface layer of the slab that are higher than the upper surface of the slab; the pre-pressing machine is suitable for pre-pressing the slab; and the hot press is suitable for hot-pressing the pre-pressed slab to obtain the oriented strand board.

[0016] According to the leveling device of the embodiment of the utility model, a pressing plate is set to press the wood chips higher than the upper surface of the slab during the movement of the slab, and the pressed wood chips are adhered to the wood chips on the upper surface of the slab by utilizing the viscosity of the glue on the wood chips, thereby removing large wood chips higher than the surface of the slab in the slab of the oriented structural particle board, avoiding the situation where the large wood chips are folded during the subsequent pre-pressing, and the quality of the oriented structural particle board can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other purposes, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0018] Figure 1 A perspective view of a leveling device according to an embodiment of the utility model is schematically shown;

[0019] Figure 2 A cross-sectional view schematically showing a leveling device according to an embodiment of the utility model at a first viewing angle; and

[0020] Figure 3 A cross-sectional view of a leveling device at a second viewing angle according to an embodiment of the utility model is schematically shown.

[0021] [Description of Reference Numerals]

[0022] 1- Leveling device;

[0023] 11- support frame;

[0024] 12-housing;

[0025] 121-installation part;

[0026] 122-upper opening;

[0027] 123-joining part;

[0028] 13-pressing plate;

[0029] 14- Leveling components;

[0030] 141-shovel plate;

[0031] 142-sweeping roller;

[0032] 1421- roller body;

[0033] 1422-cleaning unit;

[0034] 143-mounting frame;

[0035] 144 - driving motor; and

[0036] 2- Slab. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. However, the utility model can be implemented in different forms and should not be interpreted as being limited to the embodiments presented here. On the contrary, providing these embodiments will make the utility model thorough and complete, and fully convey the scope of the utility model to those skilled in the art. In the accompanying drawings, for clarity, the sizes and relative sizes of layers and regions may be exaggerated, and the same reference numerals represent the same elements throughout.

[0038] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are described to provide a comprehensive understanding of the embodiments of the present invention. However, it is obvious that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0039] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "include", "comprises", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0040] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0041] In order to facilitate those skilled in the art to understand the technical solution of the present utility model, the following technical terms are explained.

[0042] In the case of using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.). In the case of using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, or C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0043] It should be noted that, in order to facilitate those skilled in the art to better understand the technical solution of the present invention, the proportions, directions and sizes of various components in the accompanying drawings have been appropriately adjusted to increase their three-dimensional effect.

[0044] Figure 1 A three-dimensional diagram of a leveling device according to an embodiment of the utility model is schematically shown. Figure 2 A cross-sectional view of a leveling device according to an embodiment of the utility model at a first viewing angle is schematically shown. Figure 3 A cross-sectional view of a leveling device at a second viewing angle according to an embodiment of the utility model is schematically shown.

[0045] Figure 1 The direction indicated by the X-axis represents the length direction of the slab 2 , the direction indicated by the Y-axis represents the width direction of the slab 2 , and the direction indicated by the Z-axis represents the height direction of the slab 2 . Figure 3 In order to better illustrate the internal structure of the leveling device, the support frame 11 is not shown.

[0046] One aspect of the embodiment of the utility model provides a flattening device 1 for making oriented strand board, which is arranged at the front end of a pre-pressing machine and is suitable for aligning the shavings after glue application to form a slab after the paving machine upstream, and conveying the slab in a moving direction (such as a conveying belt, not shown in the figure) through a conveying mechanism (such as a conveying belt, not shown in the figure) Figure 3 The slab is transported in the direction indicated by the arrow below the slab 2, so that the slab is leveled on the leveling platform before entering the pre-pressing machine. Figures 1 to 3 As shown, the leveling device 1 includes two support frames 11, a housing 12 and a pressing plate 13. The two support frames 11 are arranged opposite to each other in the width direction (such as Figure 1The shell 12 is connected between the two support frames 11, and the pressing plate 13 extends along the width direction and is arranged at the lower part of the shell 12. The lower part of the pressing plate 13 contacts the upper surface of the slab during the movement of the slab. The pressing plate 13 is suitable for pressing the shavings that are higher than the upper surface of the slab during the movement of the slab.

[0047] According to the leveling device of the embodiment of the utility model, a pressing plate is provided to press the wood chips (especially the wood chips in an upright state) that are higher than the upper surface of the slab during its movement, and the pressed wood chips are adhered to the wood chips on the upper surface of the slab by utilizing the viscosity of the glue attached to the wood chips, thereby removing large wood chips that are higher than the surface of the slab in the slab of the oriented structural particle board, avoiding the situation where the large wood chips are folded during the subsequent pre-pressing, and improving the quality of the oriented structural particle board.

[0048] According to an embodiment of the utility model, the leveling platform is a working area of ​​the leveling device.

[0049] According to the embodiments of the present utility model, Figure 1 As shown, the contact length between the pressing plate 13 and the slab 2 in the width direction of the slab can be the width of the slab.

[0050] According to the embodiment of the utility model, the pre-pressing machine is a mechanical device for preliminary bonding before gluing in order to shorten the hot pressing cycle and improve the quality of the board during the production process. The pre-pressing machine belongs to a pressure machine. The pre-pressing machine mainly performs a short period of cold pressing on the slab after the glue coating and assembly to make it initially formed, and then sends it to the hot press for the hot pressing and gluing process. The use of the pre-pressing production method is helpful to improve the quality of the product, can reduce the auxiliary time in the hot pressing process, shorten the hot pressing cycle, improve the production efficiency of the hot press, facilitate the transportation and loading and unloading of the slab, facilitate the use of mechanical loading and unloading of the slab, reduce the labor intensity of the workers, reduce the distance between the hot pressing plates and the pad transportation equipment, save energy, and after the slabs are pre-pressed, they can also be checked one by one before entering the loading rack to find defects and repair them.

[0051] According to the embodiments of the present utility model, Figure 1 and Figure 2 As shown, the housing 12 includes two mounting parts 121, which are respectively mounted between the two support frames 11. The mounting parts 121 extend along the width direction of the slab 2 and are arranged above the slab 2. The upper and lower parts of the two mounting parts 121 respectively form an upper opening 122 and a lower opening connected to the upper opening, wherein the pressing plate 13 is mounted at the lower part of the mounting part 121 located upstream along the moving direction of the slab 2. The leveling device 1 also includes a scraping assembly 14, which is rotatably mounted on the two support frames 11 and is located between the two mounting parts 121 and downstream of the pressing plate 13 along the moving direction of the slab, and is suitable for driving the shavings that bounce up after being pressed by the pressing plate 13 away from the slab 2.

[0052] According to the embodiments of the present utility model, Figures 1 to 3 As shown, the housing 12 further includes two coupling parts 123, which are coupled between the two mounting parts 121. The two coupling parts 123 and the two mounting parts 121 form a housing structure in which the upper opening 122 is connected to the lower opening. According to an embodiment of the utility model, the pressing plate 13 and the mounting part can be connected by screwing, welding, riveting, etc.

[0053] According to the embodiments of the present utility model, Figure 2 and Figure 3 As shown, the scraping assembly 14 includes a scraping plate 141 and a cleaning roller 142. The scraping plate 141 is mounted at the lower portion of the mounting portion 121 located downstream along the moving direction of the slab 2, and the cross section of the scraping plate 14 is configured to be arc-shaped. The cleaning roller 142 is rotatably disposed between the two support frames 11 and located near the lower opening, and is suitable for cooperating with the scraping plate 141 to drive away the shavings above the upper surface of the slab 2.

[0054] According to an embodiment of the utility model, the pressing plate 13 is installed on a first installation portion located upstream, and the shoveling plate 141 is installed on a second installation portion located downstream, so as to drive the large shavings that bounce up after being pressed by the pressing plate away from the upper surface of the slab 2 in cooperation with the cleaning roller.

[0055] According to the embodiment of the utility model, the scraping plate 141 and the mounting portion 121 can be connected by any method such as screw connection, welding, riveting, etc.

[0056] According to an embodiment of the utility model, a blade can be formed at the lower end of the scraping plate to facilitate scraping off the wood shavings that are higher than the upper surface of the slab.

[0057] According to an embodiment of the utility model, the shovel plate can also be mounted on the housing in an adjustably manner.

[0058] In an illustrative embodiment, two joints are respectively provided with slide grooves, and both ends of the scraping plate along the width direction of the slab are respectively provided with limit bolts, and the upper end of the scraping plate is attached to the inside of the second mounting portion, and the limit bolts are movably mounted in the slide grooves. The installation position of the scraping plate is limited by the cooperation of the limit bolts, the slide grooves and the second mounting portion. The position of the limit bolts in the slide grooves is adjusted by the nuts that cooperate with the limit bolts, and then the distance of the scraping plate relative to the slab can be adjusted, so as to facilitate adjustment according to slabs of different thicknesses. It can be understood that the pressing plate can also be mounted on the housing in a similar adjustable manner, which will not be described in detail here.

[0059] According to an embodiment of the utility model, the scraping assembly 14 further comprises a negative pressure unit which is in communication with the upper opening and is adapted to form a negative pressure on the upper portion of the cleaning roller so as to discharge the shavings driven away by the cleaning roller.

[0060] According to the embodiment of the utility model, by providing a negative pressure unit, negative pressure is formed on the upper part of the cleaning roller, so that the shavings driven away by the cleaning roller can be discharged, and the shavings are prevented from falling on the slab 2 due to gravity.

[0061] According to the embodiments of the present utility model, Figure 2 and Figure 3 As shown, the cleaning roller 142 includes a roller body 1421 and a cleaning unit 1422. The roller body 1421 is rotatably disposed between the two support frames 11, and the cleaning unit 1422 is disposed on the outer wall of the roller body 1421. The distance between the cleaning unit 1422 and the lower end of the scraping plate 141 is smaller than the size of the shavings, so that the shavings follow the cleaning unit 1422 to rotate to the upper part of the cleaning roller 142.

[0062] According to the embodiments of the present utility model, Figure 3 As shown, at the bottom of the cleaning roller 142, the rotation direction of the cleaning roller 142 (as shown in FIG. Figure 3 The direction indicated by the arrow in the middle roller body) and the moving direction of the slab 2 (such as Figure 3 The direction of the arrow below the middle slab 2 is opposite to that of the shavings driven out of the slab to prevent the shavings from adhering to the scraping plate 141 or the cleaning roller 142.

[0063] According to the embodiments of the present utility model, Figure 1 As shown, the shovel assembly 14 further includes a mounting frame 143 and a drive motor 144. The mounting frame 143 is mounted on one of the two support frames 11, and the drive motor 144 is mounted on the mounting frame 143, which is suitable for driving the cleaning roller 142 to rotate.

[0064] According to the embodiment of the present invention, the lower surface of the pressing plate 13 is in elastic contact with the upper surface of the slab 2 .

[0065] According to the embodiment of the present invention, the pressing plate 13 is made of elastic material, for example, a stainless steel plate or an iron plate.

[0066] According to an embodiment of the utility model, the cross section of the pressing plate is configured to be arc-shaped, and the arc surface of the arc is in elastic contact with the slab to press the shavings on the surface of the slab.

[0067] Another aspect of the embodiment of the utility model provides a system for making oriented strand board, the system comprising a laying machine, any of the above-mentioned leveling devices, a pre-pressing machine and a hot press. The laying machine is suitable for directional laying of the glued strands into a slab, wherein the size of the strands located on the surface layer of the slab is larger than the size of the strands located on the core layer; any of the above-mentioned leveling devices is suitable for removing the strands on the surface layer of the slab that are higher than the upper surface of the slab; the pre-pressing machine is suitable for pre-pressing the slab; and the hot press is suitable for hot-pressing the pre-pressed slab to obtain the oriented strand board.

[0068] According to an embodiment of the utility model, a paving machine lays the glued wood chips in a directional manner to form slabs, and conveys the slabs to a leveling device for leveling via a first conveying device (e.g., a conveyor belt). The leveled slabs are conveyed to a pre-pressing machine for pre-pressing via a second conveying device (e.g., a conveyor belt). The pre-pressed slabs are hot-pressed by a hot press to obtain oriented structural particle boards.

[0069] In another exemplary embodiment, a system for making oriented strand board includes a paving machine, a plurality of any of the above-mentioned leveling devices, a pre-pressing machine and a hot press machine. The plurality of leveling devices are arranged at intervals in the length direction and the width direction of the slab.

[0070] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of various elements and methods are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0071] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present invention. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted when they may cause confusion in the understanding of the present invention, and the shapes and sizes of the components in the drawings do not reflect the actual size and proportion, but only illustrate the contents of the embodiments of the present invention.

[0072] Unless otherwise indicated, the numerical parameters in this specification and the appended claims are approximate values ​​and can be changed according to the desired characteristics obtained by the content of the utility model. Specifically, all numbers used in the specification and claims to express the content of the composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases. In general, the meaning of the expression is to include changes in certain embodiments of ±10%, changes in certain embodiments of ±5%, changes in certain embodiments of ±1%, and changes in certain embodiments of ±0.5%.

[0073] The ordinal numbers used in the specification and claims, such as "first", "second", "third", etc., to modify the corresponding elements, do not themselves mean that the elements have any ordinal numbers, nor do they represent the order of one element and another element, or the order in the manufacturing method. The use of these ordinal numbers is only used to clearly distinguish a component with a certain name from another component with the same name.

[0074] In addition, unless the steps are specifically described or must occur in sequence, the order of the above steps is not limited to the above list, and can be changed or rearranged according to the required design. And the above embodiments can be mixed and matched with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments.

[0075] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A leveling device for making oriented strand board, characterized in that: It is arranged at the front end of the pre-pressing machine and is suitable for leveling the assembled slab on the leveling platform before entering the pre-pressing machine in the moving direction. The leveling device includes: Two support frames are arranged oppositely on both sides of the leveling platform in a width direction perpendicular to the moving direction; A housing connected between the two support frames; and A pressing plate extends along the width direction and is arranged at the lower part of the shell. The lower part of the pressing plate contacts the upper surface of the slab during the movement of the slab. The pressing plate is suitable for pressing the shavings that are higher than the upper surface of the slab during the movement of the slab.

2. The leveling device according to claim 1, characterized in that: The housing comprises: Two mounting parts are respectively mounted between the two support frames, the mounting parts extend along the width direction of the slab and are arranged above the slab, the upper and lower parts of the two mounting parts respectively form an upper opening and a lower opening connected to the upper opening, wherein the pressing plate is mounted on the lower part of the mounting part located upstream along the moving direction of the slab; The leveling device also includes: The scraping assembly is rotatably mounted on the two support frames and located between the two mounting portions and downstream of the pressing plate along the moving direction of the slab, and is suitable for driving the shavings that bounce up after being pressed by the pressing plate away from the slab.

3. The leveling device according to claim 2, characterized in that: The leveling assembly comprises: a scraping plate installed at a lower portion of the mounting portion located downstream along a moving direction of the slab, wherein a cross section of the scraping plate is configured to be arc-shaped; and The cleaning roller is rotatably arranged between the two support frames and located near the lower opening, and is suitable for cooperating with the scraping plate to drive away the shavings above the upper surface of the slab.

4. The leveling device according to claim 3, characterized in that: The leveling assembly also includes: The negative pressure unit is communicated with the upper opening and is suitable for forming negative pressure on the upper part of the cleaning roller to discharge the shavings driven away by the cleaning roller.

5. The leveling device according to claim 3, characterized in that: The cleaning roller comprises: A roller body is rotatably disposed between the two support frames; and A cleaning unit is arranged on the outer wall of the roller body; Wherein, the distance between the cleaning unit and the lower end of the shoveling plate is smaller than the size of the shavings, so that the shavings follow the cleaning unit to rotate to the upper part of the cleaning roller.

6. The leveling device according to claim 3, characterized in that: The leveling assembly also includes: A mounting frame mounted on one of the two support frames; and A driving motor is mounted on the mounting frame and is suitable for driving the cleaning roller to rotate.

7. The leveling device according to claim 6, characterized in that: At the lowermost portion of the cleaning roller, the rotation direction of the cleaning roller is opposite to the moving direction of the slab.

8. The leveling device according to claim 6, characterized in that: The lower surface of the pressing plate elastically contacts the upper surface of the slab.

9. The leveling device according to any one of claims 1 to 7, characterized in that: The cross section of the pressing plate is configured to be arc-shaped.

10. A system for making oriented strand board, characterized in that: include: A paving machine is used for directional paving of the glued wood chips into slabs, wherein the size of the wood chips located in the surface layer of the slab is larger than the size of the wood chips located in the core layer; The leveling device according to any one of claims 1 to 9, suitable for removing wood chips on the surface of the slab that are higher than the upper surface of the slab; a pre-pressing machine, adapted to pre-press the slab; and The hot press is suitable for hot pressing the pre-pressed slab to obtain the oriented strand board.

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