Shaving board hot-pressing device

Abstract

The utility model relates to the field of board processing, and particularly discloses a shaving board hot-pressing device which comprises a conveying steel belt, an upper die and a lower die, the conveying steel belt is divided into a left conveying belt and a right conveying belt which are independent, the upper die and the lower die can be gathered together, a turnover disc is arranged on the conveying steel belt, and height limiting ribs are arranged on the turnover disc. The shaving board is temporarily placed on the turnover disc. In the design of the scheme, a middle area of a traditional conveying steel belt is abandoned, and the turnover disc with higher flexibility is introduced instead. The left conveying belt and the right conveying belt still bear the importance of transferring the shaving boards, and the newly-added turnover discs can enable the boards to absorb heat more accurately and more efficiently when bearing the shaving boards. In this way, the hot pressing efficiency of the shaving board is remarkably improved, and heat loss caused by empty circulation of the conveying steel belt is greatly reduced. In addition, after the hot pressing procedure is completed, the shaving board can be temporarily placed on the turnover disc, and the shaving board is transferred to the next procedure until the shaving board is fully shaped.

Description

Technical Field

[0001] This utility model belongs to the field of board processing, and specifically relates to a hot pressing device for particleboard. Background Technology

[0002] Particleboard is made from a mixture of various branches, small-diameter timber, fast-growing wood, and wood chips in a specific ratio, along with adhesives, hardeners, and waterproofing agents. It is then processed through drying, preliminary shaping, pre-pressing, and hot pressing. Single-layer particleboard press production lines with circulating steel belts offer numerous advantages, such as convenient and efficient loading and unloading, precise and easy thickness control, and a simple, stable, and reliable operating system. Typically, a common hot pressing line comprises three independently circulating conveyor belts. The particleboard is placed directly on the surface of these belts, with the ends of the three belts adjacent to each other to ensure smooth sequential transfer of the particleboard between stations. The first conveyor belt is equipped with a laying machine, the second with a pre-pressing mechanism, and the third with a hot pressing mechanism.

[0003] The hot pressing mechanism mainly consists of an upper mold, a lower mold, and a preheating unit located at the top and bottom of the steel belt. The preheating unit maintains the entire conveyor steel belt at a medium temperature. After the particleboard moves into place, the lower mold locally heats the conveyor steel belt to a high temperature. However, given the large surface area of ​​the steel belt, a significant amount of heat is wasted during the empty circulation process. Therefore, there is still room for further optimization and improvement of the hot pressing mechanism and its associated steel belt located at the third station. Utility Model Content

[0004] The purpose of this invention is to provide a particleboard hot pressing device with high heating efficiency.

[0005] To achieve the above objectives, this utility model provides a particleboard hot pressing device, including a conveyor belt, an upper mold located above the conveyor belt, and a lower mold located below the conveyor belt. The conveyor belt includes two independently circulating left and right conveyor belts and at least two rollers. The left and right conveyor belts are symmetrical, and the same roller connects the same position of the left and right conveyor belts. The rotation of the roller drives the conveyor belts. The upper mold is connected to a lifting unit, and several heating units are arranged inside the upper and lower molds. The hot pressing device also includes a turntable, which is a rectangular plate structure. The left and right sides of the turntable overlap the left and right conveyor belts, respectively. The turntable is made of thermally conductive metal. The middle area of ​​the turntable is aligned with the upper and lower molds. At least two height-limiting ribs are provided on the turntable. Viewed from above, the height-limiting ribs, the upper mold, and the lower mold are all located in the area between the left and right conveyor belts.

[0006] As an improvement to the above solution, both the upper mold and the lower mold are made of thermally conductive metal, and the heating unit is an electric heating wire or an electromagnetic heater.

[0007] As an improvement to the above solution, the upper surface of the lower mold is flush with the upper surface of the conveyor steel belt, and the lower mold is provided with rounded corners or chamfers on both sides of the front and rear sides of the rotating disk in the direction of movement.

[0008] As an improvement to the above solution, the bottom of the lower mold is provided with a lifting unit for changing its own height. When the turntable moves to the designated position, the upper mold and the lower mold move towards the turntable at the same time.

[0009] As an improvement to the above solution, the turntable and the height-limiting rib are detachably connected by screws.

[0010] As an improvement to the above scheme, the height-limiting ribs are either two parallel ribs or four ribs connected end to end to form a ring.

[0011] As an improvement to the above solution, heat-resistant anti-slip rubber is provided between the left and right sides of the turntable and the conveyor belt.

[0012] This invention offers the following advantages: The design eliminates the central area of ​​the traditional conveyor belt, replacing it with a more flexible turntable. While the left and right conveyor belts still handle the transfer of particleboard, the newly added turntable allows for more precise and efficient heat absorption. This significantly improves the hot-pressing efficiency of the particleboard and greatly reduces heat loss during the empty circulation of the conveyor belt. Furthermore, the particleboard after the hot-pressing process can be temporarily placed on the turntable until fully shaped before being transferred to the next process. This effectively avoids the risk of quality degradation due to premature movement of the particleboard, thus ensuring its quality. Attached Figure Description

[0013] Figure 1 This is a perspective view of a hot pressing device according to one embodiment;

[0014] Figure 2 This is a cross-sectional view of a hot pressing device in one embodiment.

[0015] Explanation of reference numerals in the attached drawings: 11. Left conveyor belt; 12. Right conveyor belt; 13. Roller; 21. Upper mold; 22. Lower mold; 23. Lifting unit; 31. Turntable; 32. Height limiting rib. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0019] Reference Figure 1 and Figure 2This utility model discloses a hot pressing device for particleboard, including a conveyor belt, an upper mold 21 located above the conveyor belt, and a lower mold 22 located below the conveyor belt. The conveyor belt includes two circulating left conveyor belts 11 and right conveyor belts 12, and at least two rollers 13. The left and right conveyor belts 11 and 12 are symmetrical, and the same roller 13 connects the left and right conveyor belts 11 and 12 to the same position. The rotation of the roller 13 drives the conveyor belts to move. The upper mold 21 is connected to a lifting unit 23. The upper mold 21 and the lower mold... The interior of 22 is equipped with several heating units; the hot pressing device also includes a turntable 31, which is a rectangular plate structure. The left and right sides of the turntable 31 are respectively connected to the left conveyor belt 11 and the right conveyor belt 12. The turntable 31 is made of thermally conductive metal. The middle area of ​​the turntable 31 is aligned with the upper mold 21 and the lower mold 22. At least two height-limiting ribs 32 are provided on the turntable 31. From a top view, the height-limiting ribs 32, the upper mold 21, and the lower mold 22 are all located in the area between the left conveyor belt 11 and the right conveyor belt.

[0020] In this design, the central area of ​​the traditional conveyor belt is eliminated, and a more flexible turntable 31 is introduced instead. The left and right conveyor belts still bear the responsibility of transporting particleboard, while the newly added turntable 31 allows the particleboard to absorb heat more precisely and efficiently when supporting it. This not only significantly improves the hot-pressing efficiency of the particleboard but also greatly reduces heat loss caused by the empty circulation of the conveyor belt. Furthermore, the particleboard after the hot-pressing process can be temporarily placed on the turntable 31 until it is fully shaped before being transferred to the next process. This operation effectively avoids the risk of quality degradation due to premature movement of the particleboard, fully ensuring its quality.

[0021] As an improvement to the above solution, both the upper mold 21 and the lower mold 22 are made of thermally conductive metal, and correspondingly, the heating unit is an electric heating wire or an electromagnetic heater. The heating unit heats the entire mold to 200-400℃. The electric heating wire can be connected to mains power and has a simple structure; although the electromagnetic heater has a high heating effect, it requires connection to a transformer and a controller.

[0022] As an improvement to the above solution, the upper surface of the lower mold 22 is flush with the upper surface of the conveyor steel belt, and the lower mold 22 is provided with rounded corners or chamfers on the front and rear sides of the rotating disk 31 in the moving direction.

[0023] As an improvement to the above solution, the bottom of the lower mold 22 is provided with a lifting unit 23 for changing its own height. When the turntable 31 moves to the designated position, the upper mold 21 and the lower mold 22 move towards the turntable 31 at the same time.

[0024] As an improvement to the above solution, the turntable 31 and the height-limiting rib 32 are detachably connected by screws. This design allows users to easily replace the height-limiting rib 32 with different heights according to their specific needs.

[0025] As an improvement to the above scheme, the height-limiting ribs 32 are either two parallel ribs or four ribs connected end to end to form a ring.

[0026] As an improvement to the above solution, heat-resistant anti-slip rubber is provided between the left and right sides of the turntable 31 and the conveyor belt. This solution increases the friction between the two. The anti-slip rubber is located on the edge of the turntable 31 or on the surface of the conveyor belt.

[0027] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A device for hot pressing of particle board, comprising a conveyor belt, an upper die located above the conveyor belt, a lower die located below the conveyor belt, characterized in that: The conveying steel belt comprises two left and right conveying belts which are symmetrical and circulate respectively, and at least two rollers which are connected to the same positions of the left and right conveying belts and rotate to drive the conveying steel belt to move, the upper die is connected with a lifting unit, and the upper die and the lower die are internally provided with a plurality of heating units; the hot pressing device further comprises a turntable which is a rectangular plate structure, the left and right sides of the turntable are respectively overlapped with the left and right conveying belts, the turntable is made of heat-conducting metal material, the middle area of the turntable is aligned with the upper die and the lower die, at least two height-limiting ribs are arranged on the turntable, and the height-limiting ribs, the upper die and the lower die are all located in the area between the left and right conveying belts when viewed from above.

2. The device according to claim 1, characterized in that: The upper die and the lower die are both made of heat-conducting metal material, and the heating units are electric heating wires or electromagnetic heaters.

3. The device according to claim 2, characterized in that: The upper surface of the lower die is flush with the upper surface of the conveying steel belt, and the lower die is provided with round corners or chamfers on the front and rear sides in the moving direction of the turntable.

4. The device according to claim 2, wherein: The bottom of the lower die is provided with a lifting unit for changing the height of the lower die, and the upper die and the lower die are simultaneously moved towards the turntable when the turntable moves to a specified position.

5. The device according to claim 1, wherein: The turntable and the height-limiting ribs are detachably connected through screws.

6. The device according to claim 5, characterized in that: The height-limiting ribs are in parallel or four in number and connected in a ring shape.

7. The device of claim 1, wherein: Heat-resistant non-slip rubber is arranged between the left and right sides of the turntable and the conveying steel belt.

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